Question

300 gm of water at 25ºC is added to 100 gm of ice at 0ºC. The final temperature of the mixture is

(A) – 5/3 ºC

(B) – 5/2 ºC

(C) – 5ºC

(D) 0ºC

Answer 1

Correct option (D) 0ºC

Explanation:

Heat required for melting ice 

= mL = 100 × 80 = 8 kcal 

Hear relesed = ms ΔT = 300 × 1 × 25 

= 7.5 kcal 

so ice remain unmelted