Chapter 14, Problem 14.90PAE

Interpretation Introduction

Interpretation: Assign the conversion of water into vapor at constant temperature.

Concept Introduction:

When water is heated then at NTP up to 100⁰C only the vapour pressure increases and the heat energy required is given by $m\times s\times \Delta t$, where m is the mass of the water , s is the specific heat capacity of water and Δt is the change in temperature.

At 100⁰C when water is further heated then only the state is changed. The heat required is given by $=m\times L_v$. where L_v = Latent Heat of water (L_v) to vapour = $2.3\times {10}^{6}J/k{g}^{0}C$