Heat Capacity Questions

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Sort # _______ Name _______________________ Date _____________ Instructor _______________

Chem 110: Quiz 11 (~25 Minutes)

Directions: Write answers in the spaces provided. Report all answers to the appropriate number of significant figures and with the correct units. SHOW ALL WORK!

Required Questions (practice  pp. 236-240)

  1. How many joules of heat are required to raise the temperature of 10.1 grams H2O gas from 101°C to 213°C?

 

Achievement Questions (practice  pp. 236-240)

  1. An unknown mass of aluminum at 85°C is added to 49.0 g of water at 17°C. What is the mass of the Al if the final temperature of the mixture is 31°C?

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  1. A 2.50-gram sample of unknown material changes temperature from 16.4°C to 84.1°C when 22 calories of heat are added. What is the heat capacity of this unknown material?

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  1. How many joules of heat are needed to vaporize 4.50 kg of liquid water at exactly 100°C?

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  1. What is the density of gaseous C2H2 at 2.46 atm and 84°C?

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  1. A 9.10-gram sample of O2 gas at −48°C gains 340. calories of heat. What is the final temperature of the gaseous oxygen?

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(Revised 07/2020—1)

“We are what we repeatedly do. Excellence, then, is not an act, but a habit.” Aristotle

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