Question

calculate and compare the chemical energy of coal to its gravitational potential energy. Burning 1 kg of coal releases about 3 million joules of energy. if you could use all of the chemical energy to lift another kilogram of coal, how could you lift it?

Answer 1

Answer:

Explanation:

chemical energy of 1 kg coal is 3 million joules .

If this energy is used to lift one kg of coal , let height attained be h

chemical energy = gravitational energy of 1 kg of coal

3 x 10⁶ = m g h = 1 x 10 x h

h = 3 x 10⁵ m

= 300 x 10³ m

= 300 km .

i kg coal can be lifted by height of 300 km .