Chapter 9, Problem 17QRT

Interpretation Introduction

Interpretation:

The amount of heat energy transfer required to vaporize $190g$ of butane has to be calculated.

Concept Introduction:

Molar enthalpy of vaporization:

Vaporization is a process where there is a change in phase from liquid or solid to a gas.  The process of changing the liquid phase to a gas phase is called evaporation.  The process of changing the solid phase to a gas phase is called sublimation.

The energy required per mole of a substance to change its liquid state into a gaseous state is called molar enthalpy of vaporization.  It units is $J/mol.$

Calculation of no. of moles:

  No. of moles $=\frac{m}{M}$

Where, m $=$ Weight and M $=$ Molecular mass