Chapter 5 1. What conditions will always result in an increase in theinternal en

Question

Chapter 5

1. What conditions will always result in an increase in theinternal energy of a system?

2. (2 pts) The value of Ho for the reaction belowis -1107 kJ. How many kJ of heat are released then 5.75 g ofBaO is produced?

2 Ba(s) + O2 (g) ----- 2BaO

3. (2 pts) The specific heat capacity of lead is 0.13 J/g-K. How much heat (in J) is required to raise the temperature of 15 gof lead from 22 oC to 37 oC?

4. (2 pts) Given the following reactions

N2 (g) + 2 O2 (g) ----- 2 NO2(g)              H = 66.4 Kj

2 NO(g) + O2 (g) ----- 2 NO2(g)             H = -114.2 Kj

determine the enthalpy of the reaction of nitrogen withoxygen to produce nitrogen monoxide:

N2 (g) + O2 (g) ------ 2NO(g)

5. (2 pts) The value of Ho for the followingreaction is -3351 kJ.

4 Al(s) + 3 O2(g) ------2Al2O3 (s)

The value of DHFo forAl2O3 is _____kJ.

Explanation / Answer

(2) 2 NO(g) + O2 (g) ----- 2 NO2(g)             H = -114.2 Kj

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