A gas absorbs 21.39 kJ of energy while expanding against 0.276 atm from a volume of 0.0432 L to 1.876 L. What is the energy change of the gas?

Q = 21.896kJ

Explanation:

Q = ?

∇U = 21.39kJ

W = ?

W = P∇V

W = P (V2 - V1)

W = 0.276 × (1.876 - 0.04232)

W = 0.276 × 1.83368

W = 0.5060J

Q = ∇U + W

Q = 21.39 + 0.5060

Q = 21.896kJ

The energy change corresponds to the work done by the system

Explanation:

Hello,

In this case, we should apply the first law of thermodynamics to compute the energy change:

Thus, with the given volume change we compute the corresponding work in kJ:

Then, we compute the energy change:

Best regards.

the answer is definitely c.