In an isothermal expansion of ideal gas, the work done BY the gas is +500 J. The heat absorbed by the gas is:
A+500 J
B0
CCannot determine
D-500 J
Answer & Solution
Correct answer: A. +500 J
Isothermal: ΔU = 0. So ΔU = Q - W → 0 = Q - 500 → Q = +500 J. All the work done comes from absorbed heat.
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