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...