MyQuestionIcon

5

You visited us 5 times! Enjoying our articles? Unlock Full Access!

1st Law of Thermodynamics

A piston free...

Question

A piston freely move in a insulated cylinder from volume $5$ lit to $10$ lit then calculate work done & heat during this expansion.

Open in App

Solution

As the piston is moving freely, there is no work done as there is no external external pressure.
$∴ W = 0$
Now according to first law of thermodynamics,
$Δ U = Δ H + W$
As the temperature is constant, $Δ U = 0$
$∴ Δ H = - W = 0$

Suggest Corrections

thumbs-up

0

Similar questions

22 \times 10^{- 3}

C O_{2}

undergo reversible expansion at

27^{0}

C from 2 lit to 20 lit. The work done is nearly?

Q. A gas in a piston cylinder assembly undergoes an expansion process where

P V^{1.5} =

constant. The initial pressure is

3 b a r

, the initial volume is

0.1 m^{3}

and the final volume is

0.2 m^{3}

. Determine the work done for this process.

Q. A system undergoes a process which absorbed 0.5 kJ of heat and undergoing an expansion against an external pressure of 1 atm, during the process change in internal energy is 300 J. Then predict the change in volume (lit.)

P C l_{5}

is heated in two seperate vessels of volume 5 lit and 10 lit respectively at

27^{\circ} C

The extent of dissociation of

P C l_{5}

Q. A horizontal cylinder has two sections of unequal cross-section in which two pistons

A

B

can move freely. The pistons are joined by a string. Some gas is trapped between the pistons. If this gas is heated, the pistons will

View More

Join BYJU'S Learning Program

similar_icon

Related Videos

lock

The First Law of Thermodynamics

PHYSICS

Watch in App

explore_more_icon

Explore more

1st Law of Thermodynamics

Standard XII Physics

Join BYJU'S Learning Program

CrossIcon