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.
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The pressure is constant and it is ideal gas which means:
- PV=nRT
- Here P, R, n are constant which means V∝T
- As the gas expands means T is increasing let say it is ΔT>0.
- Now the heat flow in the system is identified by the formula
- Q=nCpΔT
- Therefore from above value Q>0
- Therefore there is absorbance which means the heat flow is inward or into the gas.
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