CBSE Class 11-science Answered
The complete process can be divided into two stages i.e.
Stage 1: when the work is done by the surrounding on the gas in compressing it at constant pressure.
Assuming the process to be adiabatic, i.e. q=0
According to first law of thermodynamics q = ΔU + W
Therefore, increase in internal energy = - work done by the gas
= - p×(V2-V1) = - 100×(1-2) = 100 joule
Stage2: when heat is supplied to the gas by keeping volume of gas constant (i.e. isochoric process)
Here change in internal energy is equal to heat supplied as work done by the gas is zero.
Therefore increase in internal energy = 150 joule.
The total increase in internal energy of gas = 100 + 150 = 250 joule.
* note: In the above question we have assumed the first process to be adiabatic as nothing is mentioned.
First Law of Thermodynamics - Part 1This video explains the mechanical equivalent of heat, concept of heat, int...
Thermodynamic Processes - Part 1This video explains specific heat capacity and molar specific heat capacity...
Heat EnginesThis video explains the principle, working and efficiency of heat engines.
Second Law of Thermodynamics - Part 1This video explains the second law of thermodynamics, Kelvin–Planck state...
First Law of Thermodynamics - Part 2This video explains thermal equilibrium and the zeroth and first law of the...