The answer would be choice B because the energy decreased by 20 J
Answer:Barometer :
Barometer is a scientific device. It is used to measure air pressure in environment. Air pressure changes with distance upper and bottom sea level.
Barometer is also used for measure altitude.
Barometric pressure has main effects on water and atmosphere conditions.
Hence, Barometer is used to measure air pressure.
Explanation:
The answer is A. large differences between their boiling points
The answer & explanation for this question is given in the attachment below.