Determine the total number of kilocalories ( kcal) and kilojoules ( KJ ) of energy released when an alpine lake with 2.5 x 10′ kg of water freezes…

I need help converting and solving these word problems
Attachment 1
Attachment 2
Attachment 3
12. Determine the total number of kilocalories ( kcal) and kilojoules ( KJ ) of energyreleased when an alpine lake with 2.5 x 10′ kg of water freezes at OC duringthe winter months . ( AHfus = 334 1 / 8 ). (7 points )