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10-3-08 notes

# 10-3-08 notes - Calorimetry q=mcT heat= mass specific heat...

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10/3/2008 Calorimetry: q=mc T heat= mass specific heat capacity change in temperature Specific heat capacity is the number of joules needed to raise 1 gram of a substance 1K CT#1: Does it take more energy to heat a 100 g sample of lead or a 100 g sample of aluminum from room temperature to 100 degrees C? C(Pb)= 0.130 J/gK & c(Al) = 0.900 J/gK A) It takes more to heat Pb B) It takes more energy to heat Al C) It takes the same amount of energy since they are both being heated to 100 degrees C D) Cannot tell from the information given Q=mc T it takes more energy to heat Al to 100 degrees C CT#2: Which of the metals heated to 100 degrees Celsius will increase the temperature of 200 mL of water more? C(Pb)=0.130 J/gK and c(Al)=0.900 J/gK A) Pb will heat the water more B) Al will heat the water more C) They will heat the water the same since they are the same mass D) Cannot tell from the information given Both metals were heated to the same temperature. This took more J for the Al. Thus Al had more J to give off and heat the water.

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10-3-08 notes - Calorimetry q=mcT heat= mass specific heat...

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