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# In the presence of excess oxygen, methane gas burns in a constant-pressure system to yield carbon dioxide and water:

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1. In the presence of excess oxygen, methane gas burns in a constant-pressure system to yield carbon dioxide and water:
Calculate the value of q (kJ) in this exothermic reaction when 1.70 g of methane is combusted at constant pressure.
A. -94.6
B. 0.0306
C. -0.0106
D. 32.7
E. -9.46 × 104
2. Calculate the kinetic energy in joules of an automobile weighing 2135 lb and traveling at 55 mph.
A. 1.2 × 104
B. 2.9 × 105
C. 5.9 × 105
D. 3.2 × 106
E. 3.2 × 10-6
3. The heat absorbed by a system at constant pressure is equal to E + PV.
4. Calculate H0 at 25C for the reaction below.
2ZnS(s) + 3O2(g)  2ZnO(s) + 2SO2(g)
H  (kJ/mol) -205.6 0 -348.3 -296.8
A. -257.1 kJ
B. -879.0 kJ
C. +257.1 kJ
D. -582.2 kJ
E. +879.0 kJ

1. In the presence of excess oxygen, methane gas burns in a
constant-pressure system to yield carbon dioxide and water:
A.
-94.6
B.
0.0306
C.
-0.0106
D.
32.7
E.
-9.46 Ð§ 104
A.
1.2 Ð§ 104
B.
2.9 Ð§ 105
C.
5.9 Ã 105
D.
3.2 Ã 106
E.
3.2 Ã 10-6
4. Calculate ïH0 at 25ï°C for the reaction below.
2ZnS(s)
+ 3O2(g)
ï®
2ZnO(s)
+ 2SO2(g)
Mæ¬é¡¤
æï¤âµ½ä¬Ä¤
á&
(
*
0
Ð
Ð
Ð
áÐ
gï¤âµ½ä¬Ä¤
(kJ/mol)
-205.6
0
-348.3
-296.8
A.
-257.1 kJ
B.
-879.0 kJ
C.
+257.1 kJ
D.
-582.2 kJ
E.
+879.0 kJ

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