4 NH3 (g) + 3 O2 (g) --> 2 N2 (g) + 6 H2O (g)If the standard molar heats of formation of ammonia, NH3 (g), and gaseous water, H2O (g), are -46 kJ/mol and -242 kJ/mol, respectively, what is the value of for the reaction represented above?
A. 
-190 kJ/mol
B. 
-290 kJ/mol
C. 
-580 kJ/mol
D. 
-1270 kJ/mol
E. 
-1640 kJ/mol
2.
Based on the information above, what is the enthalpy change for the sublimation of iodine, represented below?
A. 
15 kJ/mol
B. 
21 kJ/mol
C. 
31 kJ/mol
D. 
42 kJ/mol
E. 
62 kJ/mol
3.
What is the standard enthalpy change, , for the reaction represented above? ( for is 230 kJ/mol; of is 83 kJ/mol.)
A. 
-607 kJ
B. 
-147 kJ
C. 
-19 kJ
D. 
+19 kJ
E. 
+773 kJ
4.
A 6.22-kg piece of copper metal is heated from 20.5 degrees celsius to 324.3 degrees celsius. Calculate the heat absorbed (in kJ) by the metal. The specific heat of copper is 0.385 J/g*C
A. 
49.1 kJ
B. 
728 kJ
C. 
0.728 kJ
D. 
0.0491 kJ
E. 
777 kJ
5.
A 0.1375 g sample of solid magnesium is burned in a calorimeter that has a heat capacity of 3024 J/*C. If temperature increases by 1.126*C, calculate the enthalpy of the combustion of magnesium.