If a 2kg block of copper is heated and a temperature increase of 50C is measured, how much energy has been provided?

Explanation:

Given : S=400Jkg

−1

C

−1

and L

f

=3.5×10

5

Jkg

−1

Mass of copper block m=2kg

Heat released by the copper block is equal to the heat gained by the ice to melt.

Let the mass of the ice melted be M.

Change in temperature of copper block ΔT=500−0=500

o

C

∴ mS(ΔT)=ML

f

Or 2×400×500=M×3.5×10

5

⟹ M=1.14kg

hope it help u

radiation

explanation:

heat is transmitted by radiation

0.93xc=0.93x3x10^8m/s

2.54cm is 1 inch

360seconds i 1 hr