Question

12. The temperature of 600 g of cold water rises by
15°C when 300 g of hot water at 50°C is added to
it. What was the initial temperature of the cold
water ?
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Answer 1

Answer:

let the final temperature be T

Heat absorbed by water=Heat given by water

Q=mcΔT

⇒600×4.2×15=300×4.2×(50−T)

⇒T=20 °c

So initial temperature of cold body =20−15

=5 °c

Answer 2

Answer:

5°C is the answer

Explanation:

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