The temperature of 54 g of water is raised from $15^{\circ}\mathrm{C}$ to $75^{\circ}\mathrm{C}$ at constant pressure. The change in the enthalpy of the system (given that $C_{\mathrm{p,m}}$ of water $=75\ \mathrm{J\,K^{-1}\,mol^{-1}}$) is:
(a)4.5 kJ
(b)13.5 kJ
(c)9.0 kJ
(d)18.0 kJ
Answer
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