Question

How much heat energy is needed to change 2.0 kg of ice at 0°C to water at 0°C?

Answer 1

In this process heat energy will be required just to change the sate of matter i.e required latent heat will have to supplied.

We know that latent heat required for melting of ice is

80

C

g

−

1

So,for

2

K

g

i.e

2000

g

,heat energy required will be

2000

⋅

80

=

160000

C

Answer 2

Answer:

160000C

Explanation:

In this process heat energy will be required just to change the sate of matter i.e required latent heat will have to supplied.

We know that latent heat required for melting of ice is 80Cg−1

So,

for 2Kg i.e 2000g,

heat energy required will be 2000⋅80=160000C