Answer:
1254 J
Explanation:
Applying,
Q = mcpΔT................... Equation 1
Where Q = heat, m = mass of water, cp = specific heat capacity of water, ΔT = Change in temperature.
From the question,
Given: m = 15 g, cp = 4.18 J/(g.°C), ΔT = 20°C
Substitute these values into equation 1
Q = 15×4.18×20
Q = 1254 J
Hence the amount of energy required is 1254 J
