A cylinder contains 0.15 kg of hydrogen. The cylinder is closed by a piston supporting a weight of 74 kg (Fig.). What amount of heat should be supplied to lift the weight by 0.6 m? The process should be assumed isobaric, the heat capacity of the vessel and the external pressure should be neglected.

A cylinder contains 0.15 kg of hydrogen. The cylinder is closed by a p

1.	A cylinder contains 0.15 kg of hydrogen. The cylinder is closed by a piston supporting a weight of 74 kg (Fig.). What amount of heat should be supplied to lift the weight by 0.6 m? The process should be assumed isobaric, the heat capacity of the vessel and the external pressure should be neglected.
Answer» SOLUTION :The work of expansion of a gas is `W = m_wgh = p(V_2 - V_1) = m/M R (T_2 - T_1)` Therefore `DELTAT = m_wgh M//mR` The quantity of heat is obtained from the EQUATION `Q/W = (C_(mp))/(R) = 7/2` (diatomic gas!) .

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A cylinder contains 0.15 kg of hydrogen. The cylinder is closed by a piston supporting a weight of 74 kg (Fig.). What amount of heat should be supplied to lift the weight by 0.6 m? The process should be assumed isobaric, the heat capacity of the vessel and the external pressure should be neglected.

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