What is the value of w (work) when 1.3 moles

Question

of H2 expands from 25 liters to 50 liters
against a constant external pressure of 1 atm,
then expands further from 50 to 100 liters
against a constant external pressure of 0.1
atm? Answer in calories.
Answer in units of cal

Answer 1

Solve for p*delta V at one P and add that for the second expansion.l