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Answer on Molecular Physics | Thermodynamics Question for Spandan Das

Question #12236
When stating the volume of a gas the pressure and temperature should also be mentioned.Why?
Expert's answer
When temperature is changed, volume of all kinds of matter -solid, liquid, gas changes.Thus the temperature is mentioned in case of volume expansion. For solid and liquid, the influence of pressure in the expansion of volume is negligible. However, for a gas,volume is dependent on pressure. The volume of a gas decreases as the pressure is increased and the volume increases as the pressure is decreased. Hence, the volume of a gas is dependent on both pressure and temperature. For this reason, temperature and pressure both are mentioned in the case of expansion of volume of a gas.


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