Reference no: EM132438995

Question 1: How much energy would it take to melt 1 aluminum soda can if the can starts out at 20°C, melts at 660°C, and has a mass of 14 g?

Question 2: For the following questions, use the reaction SO3(g) --> SO2(g) + 0.5O2(g), with ΔH = 98.4 kJ/mol and ΔS = 95.64 J/(mol·K). (8 points)

• Draw a possible potential energy diagram of the reaction. Label the enthalpy of the reaction.
• Is the reaction endothermic or exothermic? Explain your answer.
• What is the Gibbs free energy of the reaction at 27°C?
• Is the reaction spontaneous or nonspontaneous at 27°C? Explain your answer.

Question 3: Use Hess's law and the following equations to calculate ΔH for the reaction 4NH3(g) + 5O2(g) 4NO(g) + 6H2O(g). Show your work.

• 2N2(g) + 6H2(g) --> 4NH3(g) ΔH = -183.6 kJ/mol
• 2N2(g)+ 2O2(g) --> 4NO(g) ΔH = 361.2 kJ/mol
• 2H2(g) + O2(g) --> 2H2O(g) ΔH = -483.7 kJ/mol