Solution:
For an isothermal process, the change in internal energy is \( \Delta U = 0 \). According to the first law of thermodynamics, \( Q = \Delta U + W \), which gives \( Q = 0 + 150\text{ J} = 150\text{ J} \).
A monoatomic gas does 150 J of work in isothermal expansion. The heat supplied to the gas is
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