In calibrating the calorimeter, it is important to take the temperature of the h

Question

In calibrating the calorimeter, it is important to take the temperature of the hot water them immediately pour it in the calorimeter and start taking time/temperature data. Otherwise, the hot water is losing heat to the environment, and the recorded temperature reading for ti(hot water) will be artificially high (i.e. the water is actually colder than the student thinks it is). If this happens, will the final temperature of the system be larger or smaller than if the experiment was done correctly? What effect will this error have on the calculated calorimeter constant (higher, lower, or no effect)? Explain.

Explanation / Answer

2) In calorimetric experiment, the initial temperature is taken right after the hot is added to the calorimeter. If the temperature in turn is recorded before pouring the hot water in calorimeter, the final temperature of the system would remain unchanged, however, the temperature difference between the final and the initial temperature would be lower than the actual value. This would give a higher calorimeter constant as calorimeter constant is heat absorbed by calorimeter divided by change in temperature.

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