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Earlier discussion
2 older comments kept for context.
Emmanuel
Energy lost=m×l + m×c×change in temperature
= 10×336 + 10×4.2×100
= 3360 + 4200
= 7560
@_i_am_tobidaniel
J¹=4.2×10×100=4200
J²=336×10=3360
J=J¹+J²= 4200+3360=7560