Question

under what conditions it is better to use alcohol instead of mercury in a thermometer​

Answer 1

Explanation:

Alcohol thermometers are used rather than mercury thermometers in very cold regions because alcohol has a lower freezing point than mercury. Pure ethanol freezes at -115 degrees C, while mercury freezes at -38 degrees C. Thermometers rely upon thermal expansion of the liquid in a bulb at the base of a thin glass tube.

Answer 2

Answer:

Under extreme cold conditions

Explanation:

The freezing point of mercury is approx -39°C and that of alcohol is -114°C. Therefore, in areas of extreme cold conditions, alcohol thermometer is better to use than mercury thermometer.