Question

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°C and less than 80°C
(c) 20°C
(d) between 30°C and 50°C​

Answer 1

Answer:

(d) between 30°C and 50°C

Answer 2

Answer:

D: between 30 and 50

Explanation:

Because water expands on heating.

One litre of water at 50°C will have less mass than one litre of water at 30°C.As a result the average temperature ranges between 30° and50°C

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