m汽油=500g=0.5kg
Q汽油=qm
=4.6*10^7J/kg*0.5kg
=2.3*10^7J
m水=Q吸/cm△t (“/”是除号)
=2.3*10^7*50%除以4.2*10^3J/(kg.℃)*20℃
约等于136.9kg
答:水的质量约是136.9kg.
m汽油=500g=0.5kg
Q汽油=qm
=4.6*10^7J/kg*0.5kg
=2.3*10^7J
m水=Q吸/cm△t (“/”是除号)
=2.3*10^7*50%除以4.2*10^3J/(kg.℃)*20℃
约等于136.9kg
答:水的质量约是136.9kg.