# When the Alcohol Thermometer is placed in 20∘c water, what temperature will be recorded

When an alcohol thermometer is placed in 20-degree centigrade water the thermometer will record a temperature greater than 20 degrees centigrade. According to the equation

T = v / v β

The temperature change is inversely related to the coefficient of expansion. The value of beta for alcohol is 1.12 x 10-4 C -1.

So, the temperature recorded by the alcohol thermometer would be greater than 20.

## Further explanation about the temperature recording:

Temperature:

It is a physical quantity that measures the hotness or coldness of any substance. The device used to degree temperature is a thermometer. Three commonplace scales are there to degree the temperature of a substance.

Volume expansion occurs when a substance is expanded in three-dimensional space. The expression for volume expansion is as follows: …… (1)

Here, is the change in volume. is the initial volume. is the coefficient of volume expansion. is the temperature change.

Rearrange equation (1) for . …… (2)

The temperature change is inversely related to the coefficient of volume expansion. The value of for mercury is 1.82 x 10-4 C -1 and that for alcohol is 1.82 x 10-4 C -1. So the temperature recorded by the alcohol thermometer will be greater than .