Fuels and energy questions | form two Chemistry

(i) Why petroleum and coal are non-renewable sources of energy?
(ii) Give three alternatives to non-renewable sources of energy.

Answer / Solution

UNSOLVED

Give three examples in each of the following:
(i)Solid fuel
(ii)Gaseous fuel.

Answer / Solution

UNSOLVED

Briefly explain why:

1. the use of charcoal is harmful to the environment.
2. charcoal is still being used by majority of Tanznaians for domestic purposes.

Answer / Solution

UNSOLVED

A mass of 20.0 g of petrol was burnt in air. The heat produced was used to heat 2.5 litres of  water. Given that the heat value of petrol is 43,640 kJ/kg, by how much the temperature of water could have changed? (The specific heat capacity of water = 4.18 kJ kg​^-1 K^-1​ , Density of water = 1000 kg/m​³​ ).

Answer / Solution

UNSOLVED

Briefly explain five characteristics to be considered when looking for a good fuel.

Answer / Solution

UNSOLVED