Question

2. One litre of water at 30°C is mixed with one litre of water at
50°C.The temperature of the mixture will be
a. 80°C
b. More than 50° but less than 80°C
c. 20°C
d. Between 30°C and 50°C​

Answer 1

Explanation:

Answer: the temperature will slightly less than 40°C. Explanation: Because water expands when heated, 1 litre of water at 50°C will have less mass than 1 litre of water at 30°C. As a result, the 30°C litre has slightly more than the 50°C litre, and thus the average will end up slightly less than 40°C

Answer 2

Answer:

The temperature of the mixture will be between 30°C and 50°C because hot water loses the heat and simultaneously cold water gains heat this keeps the temperature in between 30°C and 50°C.