36. The melting point and boiling point of a substance is 70 °C and 450 °C respectively; its enthalpy of fusion is 30.0 cal g, its enthalpy of vaporisation is 45.0 cal g-l, and its specific heat is 0.215 cal gK-1 * What is the heat required to convert 100.0 g of the substance from the solid state at 70 °C to vapour at 450 °C?

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36. The melting point and boiling point of a substance is 70 °C and 450 °C
respectively; its enthalpy of fusion is 30.0 cal g-i, its enthalpy of vaporisation
45.0 cal g-l, and its specific heat is 0.215 cal g K-1 *
What is the heat required to convert 100.0 g of the substance from the solid state at 70 °C to
vapour at 450 °C?
A. 7.5 kcal
В. 10.7 kcal
С. 15.7 kcal
D. 28.7 kcal
Transcribed Image Text:36. The melting point and boiling point of a substance is 70 °C and 450 °C respectively; its enthalpy of fusion is 30.0 cal g-i, its enthalpy of vaporisation 45.0 cal g-l, and its specific heat is 0.215 cal g K-1 * What is the heat required to convert 100.0 g of the substance from the solid state at 70 °C to vapour at 450 °C? A. 7.5 kcal В. 10.7 kcal С. 15.7 kcal D. 28.7 kcal
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