1.Q吸=cm△t
c =Q吸/m△t=1470J/0.2 kg×4℃=1.8375×103J/(kg•℃)
3.Q=c水m水△t水+c铝m铝△t铝
=4.2×103J/(kg·℃)×1kg×(100-20)℃+0.88×103J/(kg·℃)×0.5kg×(100-20)℃
=336000J+35200J=707200J