Question

In the following reaction, how many moles of CH₃OH are required to produce -1.501 × 10³ kJ of heat?
2 CH₃OH (l) + 3 O₂ (g) → 2 CO₂ (g) + 4 H₂O(g) ∆H° = -1280. kJ

Answer 1

Given:

1. The amount of  heat required is equal to 1501 kJ
2. Two moles of CH₃OH produces 1280 kJ of heat.

To find:

The number of moles of CH₃OH required to produce 1501 KJ of heat.

Solution:

• Its given that two moles of CH₃OH produces 1280 kJ of heat, hence one mole of CH₃OH will produce 640 KJ of heat.
• So, the number of moles of CH₃OH required will be equal to (1501/640) = 2.345 moles.

Answer:

The number of moles of CH₃OH required to produce 1501 KJ of heat is equal to 2.345