Question

A red hot iron bar is dipped into 600 ml of water ( 600. g of water) which causes

the temperature of the water to rise from 22 degrees celcius to 89 degrees
celcius. Determine the heat lost by the iron bar. ****hint: The amount of heat lost
= amount of heat gained *

Answer 1

heat lost by iron bar is 168.2 kJ

Step-by-step explanation:

The heat gained by the water as a result of temperature rise is given by:

Q = mCΔT

ΔT = change in temperature = final temperature - initial temperature = 89°C - 22°C = 67°C

m = mass of water = 600 g

C = specific heat of water = 4.184 J/g-K

Q = heat gained

Substituting:

Q = 600 * 4.184 * 67

Q = 168.2 kJ

The heat gained by the water is 168.2 kJ

The heat lost by iron bar = heat gained by water

heat lost by iron bar = 168.2 kJ