Two glasses contain 500 mL of liquid. The liquid in glass A has a temperature of

Question

Two glasses contain 500 mL of liquid. The liquid in glass A has a temperature of 66oC, the (different) liquid in glass B has a temperature of 94oC. The liquid in glass A has a larger specific heat than the liquid in glass B. The two liquids are mixed together in a larger glass.

        CUP A              CUP B
       66oC                  94oC

Is the final temperature of the mixture
A)greater than,  
B)less than, or  
C)the same as the average temperature of 80oC of the two glasses?
Explain your reasoning.

Explanation / Answer

As Cup A is greater specific heat, it is "more influential" in the final temperature.

Thus, it must be closer to 66 C than 94 C.

Thus, it is LESS THAN 80 C. [OPTION B, ANSWER]

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