Effect of pressure and impurities on melting and boiling points

Overview

Student should be able to: Explain the relationship between the heat supplied to a substance and (a) its temperature change at constant mass. (b) It's mass at constant temperature change. Explain why there is unequal rise in temperature for different substances of the same mass supplied with the same quantity of heat. Explain the terms, specific heat capacity and thermal capacity. Calculate unknown quantities using the relation H = f\1C T when no chan~ of state is involved. Determine the melting point of a solid and boiling point of a given iiquid. List the effects of impurities and pressure on the melting point of solid and boilding point of liquid. Solve simple problems involving latent heat Distinguish between evaporation and boiling and explain sublimation Explain the working principles of such common devices as :refrigerator,air conditioner,pressure cooker. Explain the effects of humidity on personal comfort.

Lesson details

Class: SS2
Subject: Physics
Theme: Conservation Principles
Duration: 30:12

What you'll learn

Specific Heat.
Concept of specific heat capacity Its measurement Its significance
Latent Heat Concept of latent heat Measurement of specific latent heat of fusion and of
vaporization.
Effect of pressure and impurities on melting and boiling points
Some applications latent heat.
Evaporation,. boiling and Sublimation.
Relative humidity and dew point.

Effect of pressure and impurities on melting and boiling points

Quick Links

Need some help?