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hw1due011110 - 150.0 g of water at 20.0 ° C If the...

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Due Monday January 11 Dr. Matthew P. Augustine Name_________________________________________ Chemistry 2B, Winter 2010 Student ID Number______________________ Homework 1 Lab TA Name and Time______________________ Instructions: Show all of your work in addition to your answers to the following questions on a separate piece of paper. Put your name on this and all of the pages, staple your work to this page, and turn it in to your TA’s mailbox by 5 PM on Monday January 11, 2010 . (1) A 25.0 g piece of stainless steel at 88.0 ° C was placed in a calorimeter that contained
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Unformatted text preview: 150.0 g of water at 20.0 ° C. If the temperature of the water rises to 21.4 ° C, what is the specific heat capacity of the stainless steel? (The specific heat capacity of water is 4.184 J/(g· ° C)) (2) Consider the explosive formation of H 2 O( ℓ ): 2H 2 (g) + O 2 (g) → 2H 2 O( ℓ ) Calculate the enthalpy change for this reaction given that: H 2 O ( ℓ ) → H 2 (g) + ½O 2 (g) Δ H ° = 285.8 kJ (3) For a certain reaction at constant pressure, Δ U = -125 kJ and 22 kJ of expansion work is done by the system. What is Δ H for this process?...
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