Two moles of helium gas (gamma = 5 / 3 ) are initially at 27^@C and occupy a volume of 20 literes. The gas is first expanded at constant pressure until the volume is doubled. Then it undergoes an adiabatic change until the temperature returns to its initial value. (a) Sketch the process in a `p_V` diagram. (b) What is the final volume and pressure of the gas ? (c) What is the work done by the gas?

Two moles of helium gas (lambda=5//3) are initially at temperature 27^@C and occupy a volume of 20 litres. The gas is first expanded at constant pressure until the volume is doubled. Then it undergoes an adiabatic change until the temperature returns to its initial value. (i) Sketch the process on a p-V diagram. (ii) What are the final volume and pressure of the gas? (iii) What is the work done by the gas ?

Two moles of helium gas (lambda=5//3) are initially at temperature 27^@C and occupy a volume of 20 litres. The gas is first expanded at constant pressure until the volume is doubled. Then it undergoes an adiabatic change until the temperature returns to its initial value. (i) Sketch the process on a p-V diagram. (ii) What are the final volume and pressure of the gas? (iii) What is the work done by the gas ?

Two moles of helium gas (lambda=5//3) are initially at temperature 27^@C and occupy a volume of 20 litres. The gas is first expanded at constant pressure until the volume is doubled. Then it undergoes an adiabatic change until the temperature returns to its initial value. (i) Sketch the process on a p-V diagram. (ii) What are the final volume and pressure of the gas? (iii) What is the work done by the gas ?

Two moles of helium gas (gamma=5/3) is initially tat temperature t_(1)=27^(@)C and occupies a volume of V_(1)=20 litres. The gas is first expanded at consant pressure until the volume is doubled. Then it undergoes an adiabatic change until the temperature returns to its initial value. (i) Sketch the process on a p-V diagram (ii) what is the final volume and pressure of the gas, (iii) What is the work done by the gas?

Two moles of helium gas (r=5//3) are initially at a temperature of 27^(@)C and occupy a volume of 20 litre. The gas is first expanded at constant pressure until the volume is doubled. It then undergoes adiabatic change until the temperature returns to its intial value. (a) Sketch the process on P-V diagram. (b) What are final pressure and final volume of gas? (c) What is the work done by the gas?