Question

If 1.000 kcal of heat is added to 1.700 L of oxygen in a cylinder at constant pressure of 1.00 atm, the volume increases to 2.100 L. Calculate the total energy change for this process. Pay careful attention to units.
Some plz help me :(

Answer 1

delta E = q + w
I would convert 1.000 kcal to joules and substitute for q. w = -p*delta V. I would use 101.325 kPa for 1 atm pressure and substitute V2-V1 for delta V (in liters).

Answer 2

i got .990 k cal
is that right?

Answer 3

That's my answer in kcal.