How much heat must be absorbed by 125 g of ethanol to change its temperature from 21.5 oC to 34.8 oC?

Q: How much heat must be absorbed by 125 g of ethanol to change its temperature from 21.5 oC to 34.8 oC? The specific heat of ethanol is 2.44 J / (gC).

Answer:

4056.5 J

Explanation:

The formula for the specific heat capacity of ethanol is given as

Q = cm (t₂-t₁) ... Equation 1

Where q = quantity of heat, c = specific heat capacity of ethanol, m = mass of ethanol, t₁ = initial temperature of ethanol, t₂ = final temperature of ethanol.

Given: m = 125 g, t₁ = 25.5 °C, t₂ = 34.8 °C

Constant; c = 2.44 J/g.°C

Substitute into equation 1

Q = 125 (2.44) (34.8-21.5)

Q = 125 (2.44) (13.3)

Q = 4056.5 J.

Hence the amount of heat absorbed = 4056.5 J