Question

An ideal gas expands while the pressure is kept constant. During the process, does heat flow into the gas or out of the gas? Justify you answer.

Answer 1

Correct Answer - A
`p=` constant
`:.` `TpropV`
As the gas expands V increases. So, T also increase. Hence, `DeltaT` is positive. Therefore, in the expression.
`Q=nC_pDeltaT`
Q is positive.