2 Kg of water of 60°C is mixed with 1 kg of water at 30°C kept in a vessel of heat capacity 220 J K . The

Question

2 Kg of water of 60°C is mixed with 1 kg of water at 30°C kept in a vessel of heat capacity 220 J K^-1. The specific heat of water is 4200 J Kg^-1K ‘. Then the final temperature is nearly.

(a) 35°C 

(b) 45°C 

(c) 55°C 

(d) 50°C

Answer 1

(d) 50°C

According to the principle of calorimetry,