How much heat is needed to increase the internal energy of a gas in a piston by 4,736J if the gas does 750J of work on the envir

Question

4 years ago

5

onment by expanding the process

1 answer:

kykrilka [37] · Answer 1 · 2021-12-10T17:24:42+03:00

The heat absorbed by the gas is 5486 J

Explanation:

We can solve this problem by using the 1st law of thermodynamics, which states that the change in internal energy of a gas is given by:

$\Delta U = Q-W$

where:

$\Delta U$ is the change in internal energy

Q is the heat absorbed by the gas

W is the work done by the gas

In this problem, we have:

$\Delta U = +4736 J$ is the increase in internal energy of the gas

$W=+750 J$ is the work done by the gas (positive because the gas is doing work on the surroundings, by expanding)

Solving for Q, we find the heat needed:

$Q=\Delta U + W = 4736+750=5486 J$

And the positive sign tells us that this heat is absorbed by the gas.

Learn more about thermodynamics:

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