Home
Class 11
PHYSICS
Pressure and volume of a gas changes fro...

Pressure and volume of a gas changes from `(p_0V_0)` to `(p_0/4, 2V_0)` in a process `pV^2=` constant. Find work done by the gas in the given process.

Text Solution

Verified by Experts

The correct Answer is:
A, B

`pV^2=K=p_0V_0^2`
`:.` `p=(K)/(V^2)`
`W=intpdV=int_(V_0)^(2V_0)(K)/(V^2)dV`
`=[-(K)/(V)]_(V_0)^(2V_0)`
`=(K)/(V_0)-(K)/(2V_0)`
`(K)/(2V_0)`
Substituting, `K=p_0V_0^2`, we have
`W=1/2p_0V_0`
Promotional Banner

Topper's Solved these Questions

  • LAWS OF THERMODYNAMICS

    DC PANDEY|Exercise Exercise 21.3|7 Videos
  • LAWS OF THERMODYNAMICS

    DC PANDEY|Exercise Exercise 21.4|8 Videos
  • LAWS OF THERMODYNAMICS

    DC PANDEY|Exercise Exercise 21.1|1 Videos
  • LAWS OF MOTION

    DC PANDEY|Exercise Medical entrances gallery|39 Videos
  • MAGNETIC EFFECT OF CURRENT AND MAGNETISM

    DC PANDEY|Exercise Integer type Questions|10 Videos

Similar Questions

Explore conceptually related problems

Method 4 of W The temperature of n-moles of an ideal gas is increased from T_0 to 2T_0 through a process p=alpha/T . Find work done in this process.

For a thermodynamic system the pressure, volume and temperature are related as new gas law given as P=(alphaT^2)/V Here alpha is a constant. Find the work done by the system in this process when pressure remains constant and its temperature changes from T_0 to 2 T_0 .

The work done by the gas in the process shown in given P-V diagram is

The internal energy of a gas is given by U=2pV . It expands from V_0 to 2V_0 against a constant pressure p_0 . The heat absorbed by the gas in the process is

The internal energy of a gas is given by U = 3 pV. It expands from V_(0) to 2V_(0) against a constant pressure p_(0) . The heat absorbed by the gas in the process is

An ideal gas is taken through a thermodynamic cycle ABCDA. In state A pressure and volume are P_(0) and V_(0) respectively. During the process A rarr B , work done by the gas is zero and its temperature increases two fold. During the process B rarr C , internal energy of the gas remains constant but work done by it is W_(BC) = – P_(0)V_(0) ln2 . In the process C rarr D , the temperature decreases by 50% while the volume does not change. In the process D rarr A the temperature of the gas does not change. (a) Draw pressure – volume (P–V) and pressure – density (P – rho) graph for the cyclic process. (b) Calculate work done on the gas during the cycle.

The internal energy of a gas is given by U= 5 + 2PV . It expands from V_(0) to 2V_(0) against a constant pressure P_(0) . The heat absorbed by the gas in the process is :-

Pressure p, volume V and temperature T for a certain gas are related by p=(alphaT-betaT^2)/(V) where, alpha and beta are constants. Find the work done by the gas if the temperature changes from T_1 to T_2 while the pressure remains the constant.

A gas expands in a piston-cylinder device from volume V_(1) to V_(2) , the process being described by P = a//V + b , a and b are constants. Find the work done in the process.