- #1
Nick Jarvis
- 29
- 2
Morning
I am being stupid but cannot work out these problems:
1. Energy supplied to 2.0 moles of an ideal gas is 117J and it changes the temperature by 2.0K (at constant pressure).2. Calculate both molar heat capacities at constant P and V.3. Firstly, I divided 117J by 4 to get the energy required to change 1 mole by 1k. Answer was 29.25J/m/K. Seems way too simple? Then, I have:
Cp = Cv + nR, as we know that Cp is usually higher. So 29.25J/m/K = Cv + nR
I know n = 2.0 moles, but the question doesn't give R. Or should I know R? Or am I completely wrong?
Sorry if this is a basic question.
Cheers
Nick
I am being stupid but cannot work out these problems:
1. Energy supplied to 2.0 moles of an ideal gas is 117J and it changes the temperature by 2.0K (at constant pressure).2. Calculate both molar heat capacities at constant P and V.3. Firstly, I divided 117J by 4 to get the energy required to change 1 mole by 1k. Answer was 29.25J/m/K. Seems way too simple? Then, I have:
Cp = Cv + nR, as we know that Cp is usually higher. So 29.25J/m/K = Cv + nR
I know n = 2.0 moles, but the question doesn't give R. Or should I know R? Or am I completely wrong?
Sorry if this is a basic question.
Cheers
Nick