Question

What is the final temperature of the mixture if 100g of hot water at 70°C is added to 200g of cold water at 10°C? The specific heat capacity of water is 4200J/kg°C. (Neglect the heat absorbed by the container)​

Answer 1

Explanation:

Q = q

M s ( T - t) = m s (T - t)

200 × 4200 × (T-10) = 100 × 4200 × (70 - T)

2 × (T - 10) = (70-T)

2T - 20 = 70 - T

3T = 90

T = 30