Question 1
The activation energy for the following first-order reaction is 102 kJ/mol.
N
2O
5(g) → 2NO
2(g) +
1/
2O
2(g)
The value of the rate constant (k) is 1.35 × 10
–4 s
–1 at 35°C. What is the value of k at 0°C?
◦ 8.2 × 10
–7 s
–1◦ 1.9 × 10
–5 s
–1◦ 4.2 × 10
–5 s
–1◦ 2.2 × 10
–2 s
–1◦ none of these
Question 2
The activation energy for the following reaction is 60. kJ/mol.
Sn
2+ + 2Co
3+→ Sn
4+ + 2Co
2+By what factor (how many times) will the rate constant increase when the temperature is raised from 10°C to 28°C?
◦ 1.002
◦ 4.6
◦ 5.6
◦ 2.8
◦ 696