Question 1
When heated, mercury(II) oxide decomposes into elemental mercury and oxygen:
2 HgO(s) → 2 Hg(l) + O2(g) | ΔH° = 181.6 kJ | ΔS° = 216.4 J/K |
Estimate the temperature at which HgO should begin to decompose if the partial pressure of O
2(
g) is constant at 1.00 atm.
◦ 566°C
◦ -34.8°C
◦ 840°C
◦ 34.8°C
Question 2
Methanol can be produced from carbon monoxide and hydrogen with suitable catalysts:
CO(g) + 2 H2(g) → CH3OH(l) at 25°C | ΔH° = -128.1 kJ and ΔS° = -332 J/K |
Find Δ
G° at 25°C.
◦ -157.2 kJ
◦ 157.2 kJ
◦ 98.9 kJ
◦ -29.1 kJ