`C(s) + O_2(g) to CO_2(g) + 394kJ`
`C (s) + 1/2 O_2(g) to CO + 111 kJ`
In an oven using coal (assume the coal is 80% C in weight), insufficient oxygen is supplied such that 60% of carbon is converted to `CO_2` and 40% of carbon is converted to CO. Find out the heat generated when 10 kg of coal is burnt in this fashion.

Explanation

To solve the problem step by step, let's break down the information given and calculate the heat generated when burning 10 kg of coal.

### Step 1: Determine the amount of carbon in the coal
Given that coal is 80% carbon by weight, we can calculate the amount of carbon in 10 kg of coal.

\[ \text{Amount of carbon} = 10 \, \text{kg} \times \frac{80}{100} = 8 \, \text{kg} \]
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