Suppose that during the experiment, a student forgot to put the lid on the calorimeter. What is the most likely error and reason?Temperature readings will be too high because heat will be absorbed by the air.Temperature readings will be too high because the lidless coffee cups will give off heat.Temperature readings will be too low because heat will be absorbed by the air.The temperature readings will be too low because the lidless coffee cup will absorb more heat.
Answer
A
Temperature readings will be too high because heat will be absorbed by the air.
B
Temperature readings will be too high because the lidless coffee cups will give off heat.
C
Temperature readings will be too low because heat will be absorbed by the air.
D
The temperature readings will be too low because the lidless coffee cup will absorb more heat.
Explanation
Without the lid, some heat from the reaction can escape into the surrounding air instead of warming the contents of the calorimeter. The measured temperature change will therefore be smaller, making the temperature reading too low. The correct choice is “Temperature readings will be too low because heat will be absorbed by the air.”
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