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  4. Based on the first law of thermodynamics, which of the following is correct?

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Q. Based on the first law of thermodynamics, which of the following is correct?

Thermodynamics

Solution:

$\Delta U = q + w$

for an isothermal process, $\Delta U =0, q =- W$

for an isochoric process; $W=0, \Delta U=q$

for an adiabatic process, $q =0, \Delta U = W$

for a cyclic process, $\Delta U =0$

$q=-w$