Determine the mass of a silver spoon if 250kJ of energy is required to change its temperature from 20 to 40 degrees.

Determine the mass of a silver spoon if 250kJ of energy is required to change its temperature from 20 to 40 degrees. The specific heat capacity of silver is 250J kg s.

Condition:
s = 250 J / kg * ° C
t1 = 20 ° С
t2 = 40 ° С
Q = 250 kJ = 250 * 10 ^ 3 J
To find :
m-? kg
Decision :
Q = c * m * Δt
Q = c * m * (t2-t1)
From here we express the mass of silver:
m = Q / c * Δt
m = Q / c * (t2-t1)
m = 250 * 10 ^ 3/250 * (40-20) = 50 (kg)
Answer: 50 kg is the mass of a silver spoon.