Question

A block of copper of mass 2.0 kg . the block absorbs 1200J of thermal energy

Answer 1

Answer:

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

Explanation: