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

$NO \: COPY \: PASTE \\ \ \textless \ br /\ \textgreater \ NO \: SPAM \\ \ \textless \ br /\ \textgreater \ WITH \\ EXAMPLES$
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Answer 1

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(d) between 30°C and 50°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

$\huge \fbox \pink {A}\huge \fbox \green {n}\huge \fbox \blue {S}\huge \fbox \red {w}\huge \fbox \purple {E}\huge \fbox \orange {r}$

(d) between 30°C and 50°C

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.

• Hope it will helps ✅