Q43Short answer
The enthalpy of vapourisation of CCl4 is 30.5 kJ mol . Calculate the heat required for the vapourisation of 284 g of CCl4 at constant pressure. (Molar –1 mass of CCl4 = 154 g mol ).
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qp = ∆H = 30.5 kJ mol–1 284g ∴ Heat required for vapourisation of 284 g of CCl4 = –1 × 30.5 kJ mol–1 154g mol = 56.2 kJ