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You add 50 mL of water at 20C to 200 mL of water at 70C. What is the most likely final temperature of the mixture?

A. 60C
B. 50C
C. 30C
D. 45C

User Abbath
by
6.7k points

2 Answers

5 votes
100*20 + 200*80 = 300* T
T = 60
User Limbo
by
7.0k points
2 votes

Answer:

Option (a)

Step-by-step explanation:

Let c be the specific heat of water.

According to the principle of caloriemetry.

Heat lost by hot water = heat gained by cold water

200 x c x (70 - T) = 50 x c x (T - 20)

280 - 4T = T - 20

300 = 5T

T = 60 C

User Upaang Saxena
by
6.6k points