m1=0.3 кг Δt=100-20=80°C q=2.7*10^7 Дж/кг с=4200 Дж/(кг*С) m2=0.0123 кг η=?
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η=Q1/Q2=c*m1*Δt/(q*m2)=4200*0.3*80/(2.7*10^7*0.0123)=0.3 (30%)
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m1=0.3 кг Δt=100-20=80°C q=2.7*10^7 Дж/кг с=4200 Дж/(кг*С) m2=0.0123 кг η=?
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η=Q1/Q2=c*m1*Δt/(q*m2)=4200*0.3*80/(2.7*10^7*0.0123)=0.3 (30%)
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