Recent content by Pauli_Pocket

Homework Statement Enthalpies of fumaric and succinic acid are as follows: Fumaric: dH(combustion) = -1336kJ/mol C4H4O4(s) + 3O2 -> 4CO2(g) + 2H2O(l) Succinic: dH(combustion) = -1469kJ/mol C4H6O4(s) + 3.5 O2(g) -> 3H2O(l) Find the energy of the C=C bond BE: H-H: 432 kJ/mol...

Homework Statement The problem is in the attached document Homework Equations attached in pdf document The Attempt at a Solution 1->2 adiabatic compression T2=(V2/V1)^1-(Cp/Cv) = 987.7K w1=nCvdT = (1mol)((3/2)*8.314J/molK)(987.7K-298K) = 8601.3 J 2->3 w2=-PdV=-Pmax(V3-V2)...

If I just applied the 3rd equation I would be calculating work in kJ and the amount of work for a refrigerator to cool the water would be lower than for a freezer, which confuses me. Also the problem asks for electric energy in J/s or Watts. (refrigerator) w = Qc/COP = -15.696 kJ/15.278 =...

Homework Statement Compare a refrigerator set at +2 oC and a freezer set at -18 oC, both of which are operating in the room with temperature of +20 oC. What is relative amount of electric energy that will need to be used in both cases to cool a cup of water (250 ml) from room temperature to +5...