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PCC CH 100 - Temperature and Heat

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Ch 100: Fundamentals for Chemistry 1Chapter 3 Worksheet: Temperature & Heat 1/15/19Temperature:1) Convert the following temperature readings from oF to oC:i) 15 oF =ii) 70.0 oF =iii) 425 oF = 2) Convert the following temperature readings from oC to oF:i) 4. oC = ii) 37.0 oC = iii) –100. oC =3) Convert the temperatures in (2) to Ki) 4. oC =ii) 37. oC =iii) –100. oC =Heat & Specific Heat Capacity:1. A metal object of mass = 20.00 g is heated from a temperature of 25.0 oC to 200.0 oC. During this process, the metal object absorbs 1.34x103 J of energy.(i) What is the specific heat capacity?(ii) What is the heat energy required to raise the temperature of the metal object in calories?Ch 100: Fundamentals for Chemistry 2Chapter 3 Worksheet: Temperature & Heat 1/15/192) The hot metal object (in problem 1 above) is then placed into a thermally isolated container with 20.00 g of water, initially at 25.0 oC. (i) What happens to the temperature of the water? The metal object?(ii) Describe the flow of energy (heat) inside the container.(iii) What is the final temperature of the water/metal object?3) In a separate experiment, an identical metal object at a temperature of 100.0 oC is placed into a thermally isolated container containing 50.00 kg of a liquid (initial temperature of 20.0 oC) with an unknown specific heat capacity. The final temperature of the mystery liquid/metal object is 23.5 oC. (i) What is the specific heat capacity of the mystery liquid?(ii) How much heat (in Joules) would be needed to raise the temperature of the unknown liquid from 25.0 oC to 100.0 oC?(ii) How much heat (in calories) would be needed to raise the temperature of the unknownliquid from 25.0 oC to 100.0


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PCC CH 100 - Temperature and Heat

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