What amount of heat will be released during the complete combustion of 50 kg of charcoal, the heat of combustion

What amount of heat will be released during the complete combustion of 50 kg of charcoal, the heat of combustion of which is 7000 J / kg. How much water can be heated from 10 to 15 degrees Celsius with this amount of heat.

1. Let’s find the amount of heat that will be released during the combustion of 50 kg of charcoal.

Q = m q; Q = 50kg * 7000Zhd / kg = 350000J.

2. To find the mass of water, you need to use the formula: Q = cm (t2 – t1);

m = Q / c (t2 – t1) /

m = 350000J / 4200J / kg * C * (15 – 10);

m = 350,000 / 4200 * 5;

m = 16.7 kg.

Answer: 16.7 kg.