6
in energy of -5.58 kJ. The final temperature of the solution and the cup are 30.0 C. a)Using an argument based on the 1st law of thermodynamics, identify the value of q surroundings.b) Assuming that Δ Esur comes from a multicompnent thermal reservoir consisting of the solution and calorimeter only, determine the calorimeter constant Ccal where qcal = CcalΔTcal. The specific heat of the solution is 4.18 J/gK. Enthalpies of reactions1.Calculate ΔH for this reaction:
2. Calculate ΔH for the following reaction:
8 Al(s) + 3 Fe
3
O
4
(s) → 4 Al
2
O
3
(s) + 9 Fe(s)
Δ H Al
2
O
3
=−
1669.8
Δ H Fe
3
O
4
=−
1120.9
7
3. Assuming the following bond dissociation energies, determine the energy of reaction 4 (H2(g)+ ½ O2(g) H2O(l)). Assume that all bonds are single bonds except for O2(g) which has a double bond).
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- Spring '08
- Kenney
- Chemistry, Mole, Partial Pressure, Reaction
