Question

A student has two identical glasses of milk except that the temperature of the milk in one glass is 40ºF

and the temperature of the milk in the other glass is 80ºF.
At which temperature does the milk has more thermal energy? Explain

Answer 1

The milk in the other glass is 80º F has more thermal energy.

Step-by-step explanation:

Given data,

The temperature of the milk in the one glass, T = 40° F

The temperature of the milk in the another glass, T' = 80° F

Let the change in temperature of the milk from 0° C in first glass is, ΔT = 40° F

ΔT = 4.44° C

The change in temperature of the milk from 0° C in first glass is, ΔT' = 80° F

ΔT' = 26.67

The formula for the thermal energy of the substance is given by,

Q = mcΔT

Where,

m - mass of the substance,

c - specific heat capacity of the substance.

Since the 'm' and 'c' are constant for the two glasses of milk, the thermal energy of the milk depends only on the temperature.

The data shows milk in the second glass has a higher temperature.

Hence, the milk in the other glass is 80º F has more thermal energy.