Practice Test Answers

A book is falling from the top shelf of a bookcase. Which statement correctly describes the change in the energy of the book?

Propane cap c sub 3 cap h sub 8 g , Δ⁢H_f=−103.8kJ/mol reacts with oxygen to produce carbon dioxide CO sub 2 , Δ⁢H_f=−393.5kJ/mol and water cap h sub 2 cap o , Δ⁢H_f=−241.82kJ/mol according to the equation. cap c sub 3 cap h sub 8 g plus 5 cap o sub 2 g rightarrow 3 CO sub 2 g plus 4 cap h sub 2 cap o g What is the enthalpy of combustion (per mole) of cap c sub 3 cap h sub 8 g ? Use Δ⁢H_rxn=∑(Δ⁢H_f_1p⁢r⁢o⁢d⁢u⁢c⁢t⁢s)−∑(Δ⁢H_f_1r⁢e⁢a⁢c⁢tan⁡t⁢s)

Which defines the average kinetic energy of a system’s particles?

An ice cube is dropped into a glass of milk at 20 times degree C Which statement explains the transfer of kinetic energy KE ?

The overall change in enthalpy of a reaction depends only on

A copper rod that has a mass of 200 point 0 g has an initial temperature of 20 point 0 times degree C and is heated to 40 point 0 times degree C If 1 comma 540 cap j of heat are needed to heat the rod, what is the specific heat of copper? Use q is equal to m cap c sub p triangle cap t

Which statement describes mechanical energy?

Which statement defines specific heat capacity for a given sample?

According to Hess’s law, if a series of intermediate reactions are combined, the enthalpy change of the overall reaction is

Carbon reacts with oxygen to produce carbon dioxide CO sub 2 times g , Δ⁢H_f=−393.5kJ/mol according to the equation. cap c times s plus 2 cap o sub 2 g rightarrow CO sub 2 times g What is the enthalpy change of the reaction? Use Δ⁢H_rxn=∑(Δ⁢H_f_1p⁢r⁢o⁢d⁢u⁢c⁢t⁢s)−∑(Δ⁢H_f_1r⁢e⁢a⁢c⁢tan⁡t⁢s)