（热学）大学物理1)Review2)Applications
大学物理（热学） 1) Review 2) Applications
4186J=1ca(WeightFIGURE 19-1Joule'sexperimentonthe mechanicaleguivalentof heat.Ical : -g H0L-4.5 ->-5.5℃
that? Heatisisenergyfrombodytransferredoneofanothertobecauseadifference in temperature
• Heat is energy that is transferred from one body to another because of a difference in temperature
·dU=dQ+dW翰全之界以作功
•dU=dQ+dW
FiGURE19-1oThe workdone bya gas when its volumeincreases byav=Adlis-dw-Pdv第宁律dw=-pdvYado=d-pdve = -PAdp= -Pdvdw=F.d=-Fde