Question

If 155 J of heat is added to a gas that does 218 J of work as a result, what is the change in the energy of the system?

Answer 1

Answer:

q=50 kJ (as heat is absorbed, so it is positive)

w=−20 kJ (as work is done by the system, so it is negative)

∴ΔU=q+w=50−20=30kJ

Therefore, internal energy change increases by 30 kJ.

Hence, the correct answer is option A.

Explanation:

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