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.

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 :(

DrBob222 · Answer

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).

lori · Answer

i got .990 k cal is that right?

DrBob222 · Answer

That's my answer in kcal.