Question

We consider a thermodynamic system. If `Delta"U"` represents the increase in its internal energy and W the work done by the system, which of the following statements is true?

विकल्प

• `Delta"U"` =-W in an adiabatic process

• `Delta"U"`= W in an isothermal process

• `Delta"U"`=-W in an isothermal process

• `Delta"U"`= W in an adiabatic process

Answer 1

`Delta"U"` =-W in an adiabatic process

Explanation:

By the first law of thermodynamics,

`"Q" = Delta"U" +"W"`

`"In adiabatic process, Q" = 0 Rightarrow Delta"U" = -"W"`