1. Find ∆H for the reaction: W(s) + C(graphite) → WC(s)
Use these reaction with known ∆H:
2W(s) + 3O2(g) → 2WO3(s); ∆H= -1685.8 kJ (1)
C(graphite) + O2(g) → CO2(g); ∆H= -393.5 kJ (2)
2WC(s) + 5O2(g) → 2WO3(s) + 2CO2(g); ∆H= -2391.8 kJ (3)
2. The following data were collected for the reaction:
2NO(g) + H2(g) → N2O(g) + H2O(g)
Experiment |
Initial [NO] (M) |
Initial [H2] (M) |
Initial rate (M/s) |
1 |
6.4x10-3 |
2.2x10-3 |
2.5x10-5 |
2 |
12.8x10-3 |
2.2x10-3 |
1.0x10-4 |
3 |
6.4x10-3 |
4.4x10-3 |
5.0x10-5 |
4 |
3.2x10-3 |
4.4x10-3 |
1.25x10-5 |
a. Determine the rate law for the reaction
b. Calculate the rate constant
3. Hydrogen and iodine react according to the equation:
H2(g) + I2(g) ⇔ 2HI(g) Kc =49.7 at 4580C
Suppose 1.00 mol H2 and 2.00 mol I2 are placed in a 1.00-L vessel.
a) What are the concentrations of substances in the gaseous mixture when it comes to equilibrium at 4580C?
b) Compressing the gases, how will the following changes affect the equilibrium?
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