Reaction Represented Chapter 6 Quiz Test
5 Questions
| Attempts: 627
Questions and Answers
- 1.
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.
- A.
73.51 kJ/mol
- B.
602.0 J/mol
- C.
27.76 J/mol
- D.
602.0 kJ/mol
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