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oksano4ka [1.4K]
2 years ago
10

Please help, this is stem class!! Due in 30 minutes!!

Chemistry
2 answers:
7nadin3 [17]2 years ago
8 0

Answer: .....

Explanation:

Leto [7]2 years ago
8 0

answer it your self mate

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Write an equation that expresses the law of thermodynamics in terms of heat and work
Anettt [7]

We write DE = q+w, where DE is the internal energy change and q and w are heat and work, respectively.

(b)Under what conditions will the quantities q and w be negative numbers?

q is negative when heat flows from the system to the surroundings, and w is negative when the system does work on the surroundings.

As an aside: In applying the first law, do we need to measure the internal energy of a system? Explain.

The absolute internal energy of a system cannot be measured, at least in any practical sense. The internal energy encompasses the kinetic energy of all moving particles in the system, including subatomic particles, as well as the electrostatic potential energies between all these particles. We can measure the change in internal energy (DE) as the result of a chemical or physical change, but we cannot determine the absolute internal energy of either the initial or the final state. The first law allows us to calculate the change in internal energy during a transformation by calculating the heat and work exchanged between the system and its surroundings.

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3 years ago
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igggu;£?90; fl d cfhsbndbfvf gfss ,d d h dgd vfvfvdvv

8 0
3 years ago
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Is each of these statements true? If not, explain why.(g) The rate of a reaction increases as the reaction proceeds.
Elina [12.6K]

The rate of a reaction rises as it progresses. The answer is false

<h3>What causes a reaction's rate to increase?</h3>

Generally speaking, raising the temperature of the reaction system, raising the concentration of a reactant in solution, and raising the surface area of a solid reactant will all raise the rate of a reaction. A catalyst can be added to the reaction mixture to speed up a process as well.

As reactants are used up, reactions often get slower with time. Catalysts are substances that, when added to a process, speed it up even if they are not themselves reactants.

learn more about reaction's rate refer

brainly.com/question/7578129

#SPJ4

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2 years ago
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Norma-Jean [14]

Answer:

340 J·K⁻¹mol⁻¹  

Explanation:

I looks like the standard entropy increases approximately linearly with the number of C atoms.

I plotted S° vs the number of C atoms and got the graph shown below.

It appears that S° for four carbon atoms should be about 340 J·K⁻¹mol⁻¹.·

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3 years ago
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Mkey [24]
The correct answer for this question is a steel
5 0
3 years ago
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