Answer:
4142.16J
Explanation:
Given parameters:
Mass of water in the beaker = 45g
Initial temperature = 67°C
Final temperature = 45°C
Unknown:
Quantity of heat released = ?
Solution:
To solve this problem, we use the expression below:
H = m cФ
H is the quantity of heat
m is the mass
c is the specific heat = 4.184J/g°C
Ф is the change in temperature
H = 45 x 4.184 x (45 - 67) = 4142.16J
The amount of heat released is 4142.16J
