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CH302 Chapter 5,9 and 10 Review (and more) answers

# CH302 Chapter 5,9 and 10 Review (and more) answers -...

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1. Calculate Δ H o rxn for the following reaction: kJ 10 2.22 - H O 4H CO 3 O 5 H C 3 ) ( 2 2(g) 2(g) (g) 8 3 × = Δ + + l =-2219.9kJ/mol the rxn is exothermic so the -ve value makes sense. Chapter 5 If 1.00 x 10 2 mL of hydrogen, measured at 25.0 o C and 3.00 atm pressure, and 1.00 x 10 2 mL of oxygen, measured at 25.0 o C and 2.00 atm pressure, were forced into one of the containers at 25.0 o C, what would be the pressure of the mixture of gases? atm 5.00 = atm 2.00 + atm 3.00 P P P 2 2 O H Total = + = Note: for each vessel if you know P,V,T you can set up an expression for n, and when the gases are combined, n total = n a + n b + n c . If the gases are already in the same container, then V and T will be the same, so you can just use symbols (V and T) and you'll find if you carry through the math then they should cancel out. Its often a good idea to leave R as a symbol too as it may cancel. . but it depends on the exact problem. Don’t overlook the simple stuff also: if you’ve got grams and the formula, you’ve also got moles of that gas! Chapter 10

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CH302 Chapter 5,9 and 10 Review (and more) answers -...

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