• +q → absorbs heat
• –q → loses heat
Heat transfer: hot to cold
heat released by water = heat absorbed by lead
– qwater = + qlead
At thermal equilibrium:
▪ final temperature of water = final temperature of lead = final temperature of system
A 2.51 g lead weight, initially at 10.6˚C, is submerged in 7.86 g of water at 52.4˚C in an insulated container. What is the final temperature of both the weight and the water at thermal equilibrium? (clead= 0.128 J/(g•oC))
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