Question

A 34 g glass thermometer reads 21.6°C before it is placed in 135 mL of water. When the water and thermometer come to equilibrium, the thermometer reads 38.7°C. What was the original temperature of the water?


I need help on this please could someone please help out.Thank you!

Answers

bobpursley
the sum of heats gained is zero.

massglass*specheatglass*(21.6-38.7)+135*specheatwater*(Ti-38.6)=0

solve for Ti
I got 15.43 degree Celsius but its wrong. I don't know why please help. Thank you!

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