Three moles of an ideal monatomic gas expands at a constant pressure of 2.5atm ; the volume of the gas changes from $\mathbf{3}\mathbf{.}\mathbf{2}\mathbf{\times }{\mathbf{10}}^{\mathbf{-}\mathbf{2}}{\mathit{m}}^{\mathbf{3}}$to $\mathbf{4}\mathbf{.}\mathbf{5}\mathbf{\times }{\mathbf{10}}^{\mathbf{-}\mathbf{2}}{\mathit{m}}^{\mathbf{3}}$. Calculate (a) the initial and final temperatures of the gas; (b) the amount of work the gas does in expanding; (c) the amount of heat added to the gas; (d) the change in internal energy of the gas.

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