## Tuesday, October 23, 2007

### Study guide H C Verma JEE Physics Ch. 23 HEAT AND TEMPERATURE

JEE topics

Ideal gas laws 24.7;
Thermal expansion of solids, liquids and gases 23.10;

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Sections in the chapter

23.1 Hot and Cold bodies
23.2 Zeroth law of thermodynamics
23.3 Defining scale of temperature: Mercury and resistance thermometers
23.4 Constant volume gas thermometer
23.5 Ideal gas temperature scale
23.6 Celsius temperature scale
23.7 Ideal gas equation
23.8 callender's compensated constant pressure thermometer
23.10 Thermal expansion

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Study Plan

Day 1
23.1 Hot and Cold bodies
23.2 Zeroth law of thermodynamics
23.3 Defining scale of temperature: Mercury and resistance thermometers

day 2
23.4 Constant volume gas thermometer
23.5 Ideal gas temperature scale
23.6 Celsius temperature scale
23.7 Ideal gas equation

Day 3
23.8 callender's compensated constant pressure thermometer
23.10 Thermal expansion

Day 4
Worked out examples 1 to 10
Day 5
WOE 11 to 17

Day 6
Exercises 1 to 10

Day 7
Exercises 11 to 20

Day 8
Exercises 21 to 30

Day 9

Exercises 31 to 34
Objective I

Day 10
Exercises
Objective II
questions for short answer 1 to 13

Revision Period

Day 11
Concept Review

Day 12
Formula Review

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In this chapter, heat is defined, zeroth law of thermodynamics is given, and temparature measurement with mercury thermomters, resistance thermometer, and constant volume gas thermometer are discussed.

* The energy that is tranferred from one body to the other, without any mechanical work involved, is called heat.

* Two bodies are said to be in thermal equilibrium if no transfer of heat takes place when they are placed in contact.

* Zeroth law of thermodynamics: If two bodies A and B are in thermal equilibiurm and A and C are also in thermal equilibrium then B and C are also in thermal equilibrium.

* zeroth law allows us to introduce the concept of temperature to measure the hotness or coldness of a body.

*All bodies in thermal equilibrium are assigned equal temperature.

* To measure temperature, we can choose a substance and look for a measurable property of the substance which monotonically changes with temperature.

* Length of mercury in long capillary, resistance of a wire, pressure of gas when volume is kept constant are properties which can be used for temperature measurement.