(b) A certain gas ha $\mathrm{c}_{\mathrm{p}}=1.968$ and $\mathrm{c}_{\mathrm{v}}=1.507 \mathrm{~kJ} / \mathrm{kg} \mathrm{K}$. Find its molecular weight and the gas constant. A constant volume chamber of $0.3 \mathrm{~m}^{3}$ capacity contains 2 kg of this gas at $5^{\circ} \mathrm{C}$. Heat is transferred to the gas until the temperature is $100^{\circ} \mathrm{C}$. Find the work done, the heat transferred, and the changes in internal energy. enthalpy and entropy.
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