0

Guest

Courses New

what is meant byt the statement, “internal energy is afunction of state”. will the internal energy of a system increase or decrease when work is done on it? write the mathematical statement for the first law of thermodynamics. write the convention used for determination of a sign of work done in this expression.

what is meant byt the statement, “internal energy is afunction of state”. will the internal energy of a system increase or decrease when work is done on it? write the mathematical statement for the first law of  thermodynamics. write the convention used for determination of a sign of work done in this expression.

Grade:12

1 Answers

Susmita
425 Points
5 years ago
That means that internal energy change of a system depends only on the final and initial state of the system and not on how the system reaches that state.Suppose you choose two path(one adiabatic and one isothermal)to go from initial state P1,V1,T1 to final state  P2,V2,T2.You know that work done will depend on the path,for adiabatic process work done is different from work done in isothermal process.But internal energy change in both cases are the same because the initial and final states are the same.
When work is done on the system internal energy increases.
The first law can be mathematically written as
dcut(Q)=dU+dcut(W)
dcut is means not perfect differential.
Work done by the system is positive.
Please approve if helped.thank u.
 

Think You Can Provide A Better Answer ?

Other Related Questions on General Physics

View all Questions »

ASK QUESTION

Get your questions answered by the expert for free

Answer and earn gift vouchers

Win Gift vouchers upto Rs 500/-

View courses by askIITians

Design classes One-on-One in your own way with Top IITians/Medical Professionals

Click Here Know More

Complete Self Study Package designed by Industry Leading Experts

Click Here Know More

Live 1-1 coding classes to unleash the Creator in your Child

Click Here Know More

a Complete All-in-One Study package Fully Loaded inside a Tablet!

Click Here Know More