# Reaction Represented Chapter 6 Quiz Test

5 Questions | Attempts: 627
Share  Settings  • 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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