Use the information in the table to calculate ASrxn
for each of these reactions. Round all answers to
nearest whole number.
Answers
Answer:
-198
-5
-148
Explanation:
The entropy of a system is usually denoted by the symbol 'S'. The change in entropy is given as ΔS. It is generally expressed in JK⁻¹mol⁻¹.
What is entropy?The entropy is defined as the property of a system which measures the disorder or randomness of the system. Like internal energy and enthalpy entropy is a state function and it is also an extensive property.
The change in entropy is given as:
ΔS reaction = S-Products - S -Reactants
1. ΔS = (2 × 192.5 - (3 × 130.58 + 191.50) = -198.24 J/K
2. ΔS = (213.6 + 2 × 188.83) - 186.3 + 2 × 205.0 = -5.04 J/K
3. ΔS = (2 × 220.0) - (2 × 191.50 + 205.0) = -148 J/K
For spontaneous process in isolated systems, the entropy change is positive. The greater the disorder in a system, the higher is the entropy. The solid state has lower entropy.
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Related Questions
I need help, please answer
Answers
Answer:
it explodes
Explanation:
Answer:
Mrs girl I'm sorry I don't know
I just need the points
A bowler lifts her bowling ball a distance of 0.5 meters using 35 joules of energy. If, on Earth, a 1.0 kilogram mass weighs 9.8 newtons, the mass of the bowling ball used by this bowler is about;
Answers
Answer:17.5
Explanation: (0.5 meters)(35 Joules) =
When the bowler lifts the bowling ball for a distance of 0.5 m, the mass of the bowling ball used by the bowler is 17.3 kg.
What is Energy?The ability to do work is called Energy.
As work done and energy has the same units. The energy required is equal to the work done.
E = W = 35 J
Force acting on the ball is equal to the weight of the ball.
F = Weight =mg
where m = mass of the bowling ball and g = acceleration due to gravity
Substituting the given energy and distance moved, we have
[tex]35 = m\times9.81\times0.5\\ m=17.3 \:\rm kg[/tex]
Therefore, the mass of the bowling ball is 17.3 kg.
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how many helium atoms are in a mole of helium?
Answers
Answer:1 mole of helium gas contains 6.02 x1023 helium atoms
Explanation:I hope this helps
Algae and other phytoplankton are the major producers of the earth's:
oxygen
carbon dioxide
hydrogen
nitrogen
Answers
Answer:
oxygen
Explanation:
pls mark me brainliest right
I'll give brianliest if correct .
Answers
Answer:
the answer is decaying wood
1. What was the mass of a sample of water if the addition of 4280 joules raised the temperature of the sample from 22.00C to 34.50C?
2. What is the specific heat of a sample of an alloy if 3750 joules of heat are released when a 315 gram sample of alloy cools from 78.00C to 28.40C?
3. The specific heat of iron is 0.448 J/g0C. What will be the final temperature if 35000 joules of heat are added to a 454 gram sample of iron at 24.00C?
4. What will be the final temperature when 8750 joules are added to 75.0 grams of water at 23.00C?
5. When 38800 joules were added to a sample of iron, specific heat 0.448 J/g0C, the temperature rose from 24.5 deg C to 178 deg C. What was the mass of the iron sample?
Answers
Explanation:
Number 1
Q = 4280J
mass = x
∆∅ = 34.5 - 22
∆∅ = 12.5°C
Specific heat capacity of water = 4200J
Q = mc∆∅
4280 = x(4200)(12.5)
4280 = 52500x
x = 4280/52500
x = 0.0815kg
Number 2
c = x
Q = 3750
m = 315g
∆∅ = 78 - 28.4
∆∅ = 49.6°C
Q = mc∆∅
3750 = 315×x×49.6
3750 = 15624x
x = 3750/15624
x = 0.2400J(g°C)-¹
Number 3
c = 0.448
Q = 35000
m = 454g
∆∅ = x
Q = mc∆∅
35000 = 454(0.448)(x)
35000 = 203.392x
x = 35000/203.392
x = 172.0815
∅2 - ∅1 = ∆∅
∅2 = ∆∅ + ∅1
∅2 = 172.0815 + 24
∅2 = 196.0815
∅2 = 196°C
Number 4
Q = 8750J
m = 75g = 0.075
c = 4200J/kg/°C
∆∅ = x
Q = mc∆∅
8750 = 0.075(4200)∆∅
8750 = 315×x
x = 8750/315
x = 27.7778
∅2 - ∅1 = 27.7778
∅2 = 27.7778 + ∅1
∅2 = 27.7778 + 23
∅2 = 50.7778
∅2 = 50.8°C
Number 5
Q = 38800J
c = 0.448J/(g°C)
∆∅ = 178 - 24.5
∆∅ = 153.5°C
m = x
Q = mc∆∅
38800 = x × 0.448 × 153.5
38800 = 68.768x
x = 38800/68.768
x = 564.2159
x = 564g
Which mutation in a fruit fly could be passed on to its offspring
Answers
Cyclopropene decomposes to propene when heated to 500 C, calculate rate constant for the first order reaction 0 min 1.48 mmol/L
Answers
Answer:
k = 0.0306 min-1
Explanation:
The table is given as;
Time, Concentration
0 1.48
5 1.27
10 0.98
15 0.84
The integrated rate law for a first order reaction is given as;
ln [A] = -kt + ln [Ao]
where;
[A] = Final Concentration
[Ao] = Initial Concentration
k = rate constant
t = time
In the table, taking the first two sets of values;
t = 5
k = ?
[Ao] = 1.48
[A] = 1.27
Inserting into the equation;
ln(1.27) = - k (5) + ln(1.48)
ln(1.27) - ln(1.48) = -5k
-0.1530 = -5k
k = -0.1530 / -5
k = 0.0306 min-1
Due tonight! Please help!
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Calculate the concentration in grams per liter of a 450.0 mL solution containing
0.0762 moles of iodine gas (I2)
Answers
Answer:
42.98 g/L
Explanation:
What has to be equal on both sides of the chemical reaction in order for it to be balanced?
total number of molecules
sum of the subscripts
total number of atoms
sum of the coefficients
Answers
Answer:
total number of atoms
Explanation:
if you have 6 carbon atoms in reactants then you should have 6 carbon atoms in products.
6. An acidic solution of potassium dichromate is mixed with an aqueous solution of
hydrogen peroxide.
Answers
What is the molarity of a solution made from dissolving 3.0 moles of Saline (NaCl) in 0.25 L of solution?
Answers
Answer:
D
Explanation:
all ya got to do is divide the moles from the solution... so 3.0 divided by 0.25. put it in a calculator
hope this helps
The molarity of a solution made from dissolving 3.0 moles of Saline (NaCl) in 0.25 L of solution is 12M.
What is Molarity?Molarity of a given solution is known as the total number of moles of solute per litre of the solution. A solution that is 1.00 molar (written 1.00 M) contains 1.00 mole of solute for every liter of solution.
Molarity = (No. of moles of solute ÷ Volume of solution in liters)
The unit of molarity is mol L⁻¹.
Molarity is temperature dependent because as temperature changes, volume of the solution also changes.
Given,
3.0 moles of Saline (NaCl)
Volume of solution = 0.25L
Molarity = (No. of moles of solute ÷ Volume of solution in liters)
Molarity = 3 ÷ 0.25 = 12 M
Therefore, The molarity of a solution made from dissolving 3.0 moles of Saline (NaCl) in 0.25 L of solution is 12M.
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11.
The characteristics of a group of elements are listed in the table.
Characteristics of a group of Elements
• Solid at room temperature
• Good conductor of electricity
• Atoms have one valence electron
Which of these elements is in this group?
A. Sodium
B. Phosphorus
C. Bromine
D. Neon
Answers
Answer:
Sodium
Explanation:
I dont know but its a wild guess
Answer:
sodium
Explanation:
its solid at room temp, most metals are good conductor of electricity and also its in group 1A so it has one valence electron
Which of the following is not a stimulus?
A hearing a loud noise
B. sneezing
C. touching a hot object
D. tasting a lemon
Answers
Answer:
B. sneezing
Explanation:
Because every other one is an action resulting in stimulation.
what is the uncertian digit in 0.054 g
Answers
Answer:
5.4g
Explanation:
What does climate change have to do with chemistry
Answers
Answer:
Well there are chemicals in the air like CO2 and nitrogen
Explanation:
These are chemicals and chemists deal with chemicals
how many Valance electrons does Bismuth have?
please help me. i'm doing a test
Answers
Answer:
5 valence electrons
Thus, bismuth would have 5 valence electrons
Explanation:
Hope it helps
Where are most algae found?
on the surface of lakes
growing on the ocean bottoms
floating on water world-wide
in forests around the world
Answers
Answer:
on the surface of lakes
Explanation:
If a 60 kg object is moving at a velocity of 10 m/s and it's 25 meters high off the ground what would if mechanical energy be?
Answers
Answer:
Like all questions in this sublevel, the work done by non-conservative forces must be related to the changes in energy of the object (see Physics Rules section above). In the case of the car skidding to a stop, the kinetic energy equation (see Formula Fix section below) can be used to determine the initial and final kinetic energy of the car. Since the car is on the ground, the height and potential energy can be regarded as zero.
Explanation:
Please help! It’s due today. I’ll give brainliest
Answers
True or False: if chemicals behave in a similar way they are grouped together on the periodic table
Answers
Answer:
Explanation: it is true
2. How would type of substance affect the rate of reaction?
Answers
Answer: IN terms of the collision theory, increasing the concentration of a reactant increases in the number of collisions between the reacting species per second and therefore increases the reaction rate.
Explanation: hope u get it right
A tall stack of books is sitting on a table. One of the reasons the book stay where they are is because-
Choices:
A: The chair is helping to hold the table up.
B: The table is exerting a balanced force on the books.
C: The books are exerting an unbalanced force on the table.
D: The books keep shifting enough to keep the stack balanced.
Please help me!
Answers
Write the information provided by a balanced equation.
Answers
Answer:
2 Fe 2O 3 + 3 C → 4 Fe + 3 CO 2
Explanation:
yeap
Give one safety precaution should take during carbon and lead oxide experiment
Answers
Answer:
use safety goggles
Explanation:
plz give me brainleist
Explanation:
Did the argon change state as you heated the atoms?
Answers
When heat is added to a substance, the molecules and atoms vibrate faster. As atoms vibrate faster, the space between atoms increases. Solids, liquids and gases all expand when heat is added. When heat leaves all substances, the molecules vibrate slower. So yes, it can if the heat is strong enough to change the objects compesistion! :)
Argon is a noble gas. It always exists in the form of gas. The boiling point of argon is very higher and thus we cant change its state, by simply heating.
What is argon ?Argon is 18th element in periodic table. It has 18 electrons and 18 protons. The mass number of argon is around 36 g/mol. Argon is included in the group 18 called the noble gases.
All the noble gases are highly stable and they are not reactive at normal conditions. They cant be easily form compounds or change their state by excitation or photochemical reaction.
Argon has higher melting point and boiling point. It cannot be easily transformed to another state by simply heating. But there occurs electron excitation, where the phase change cannot occurs.
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True or False
All cells are the same on the inside
HELP ME!
Answers
Please Help!
How is a pure sample of cobalt obtained
Answers
4) Calculate the net force *
Answers
3 N
10-7= 3
the arrows are opposing each other.
Answer:
The net or resultant force depende on the direction we can easily understood the directions are opposite .Force is vector so if vectors are opposite we difference the two vectors.
10N-7N=3N
Are humans more similar to trees or bacteria? How do you know?(1 point)
A
Humans are more similar to bacteria because trees cannot move around their environment.
B
Humans are more similar to trees because bacteria are too small to see.
C
Humans are not similar to trees or bacteria. Humans are a special species that is not related to any other species on Earth.
D
Humans are more similar to trees because all plants and animals are part of the same domain.
Answers
Answer:
a
Explanation:
Answer:
Option D
Explanation:
A and B both make sense to some level.
For option A,trees can only move while bacteria and humans can both move and locomote so there's that similarity
For option B,humans and plants are not micro organisms but bacteria are so there's that similarity
Option C is just not true
Option D is the right answer thus both humans and animals are eukaryotes