An ideal gas expands reversibly while the pressure is kept c

An ideal gas expands reversibly while the pressure is kept constant. Does heat flow into the gas or out of the gas during the process?Justify your answer(using both mathematics and statements.

Solution

Expansion reprsents work is done by the gas. Therefore heat flow into gas.

Ideal gas equation, PV=nRT

P/nR=T/V = constant. If V increases, T is also increases. this maintains the P/nR is constant. Hence heat flow into the gas.