- Only two thermodynamic variables are sufficient to describe a system because third variable can be calculated from equation of state of the system.

- P-V Indicator Digram is just a graph between pressure and volume of a system undergoing an operation.

- When a system undergoes an expansion from state A (P
_{1}V_{1}) to a state B (P_{2}V_{2}) its indicator digram is shown as follows.

- In case of compression system at state A(P
_{1}V_{1}) goes to a state B(P_{2}V_{2}) its indicator digram is as follows.

- Intermediate states of system are represented by points on the curve.

- The pressure volume curve for a fixed temperature is called isotherm.

Consider P-V diagram for an ideal gas

Draw the corresponding T-P diagram

here

$P= \frac {constant}{V}$

or

$PV= constant$

So it means temperature is constant.So here is the TP diagram

Since TV diagram is a straight line

T/V =constant

it means Pressure is constant

Draw the corresponding P-V diagram for the given T-V diagram

Since T is constant

PV diagram should be isotherm

- Introduction
- Concept of Heat
- P-V Indicator Digram
- |
- Work done by Gas in volume changes
- |
- Internal Energy
- |
- First Law of Thermodynamics
- |
- Specific Heat Capacity of Ideal GAS
- |
- Thermodynamic Processes
- |
- Quasi static Processes
- |
- Isothermal Process
- |
- Adiabatic Process
- |
- Isochoric process
- |
- Isobaric process
- |
- Cyclic process
- |
- Work done in Isothermal process
- |
- Work done in an Adiabatic process
- |
- Heat Engine and efficiency
- |
- Principle of a Refrigerator
- |
- Second law of thermodynamics
- |
- Reversibility and irreversibility
- |
- Carnot's Heat Engine
- |
- Carnot Theorem
- |
- Solved Examples

- Thermodynamics Questions
- |
- Multiple Choice Questions
- |
- P-V diagram Problems and Solutions
- |
- Carnot Cycle Problems

Class 11 Maths Class 11 Physics Class 11 Chemistry

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