(a)
Interpretation: The liquid-vapour phase boundary for the given vapour pressure data has to be plotted.
Concept introduction: The liquid vapour phase boundary for the vapour pressure has a positive slope. This shows that as the pressure increases the temperature also increases and thus as pressure increases the boiling point also increases.
(b)
Interpretation: The standard boiling point of methane has to be estimated.
Concept introduction: The standard boiling temperature is the temperature at which the liquid is in equilibrium with the standard pressure of
(c)
Interpretation: The standard enthalpy of vapourization of methane (at standard boiling point) given that molar volumes of liquid and vapour at standard boiling temperature are
Concept introduction: The enthalpy of vapourization of a substance is derived from Clausisus-Clayperon equation which states the change in pressure with change in temperature.
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