Chemistry Semester 2 Review

Front

What is a Double Replacement Reaction?

Back

A chemical reaction where ions in two compounds exchange places to form two new compounds. Example: 2AgNO3 (aq) + CaCl2 (aq) → 2AgCl (s) + Ca(NO3)2 (aq).

Front

How do you balance a chemical equation?

Back

By adjusting the coefficients in front of the compounds to ensure the same number of each type of atom on both sides of the equation.

Front

What is the coefficient for NO in the reaction N2 + O2 → _ NO?

Back

2.

Front

What are the products of the reaction NaCl + CaO?

Back

Na2O + CaCl2.

Front

What is Activation Energy?

Back

The minimum energy required for a chemical reaction to occur.

Front

How much activation energy is needed for the reaction in the example?

Back

100 KJ.

Front

What is Enthalpy (ΔH) in a chemical reaction?

Back

The total heat content of a system, which can indicate whether a reaction is exothermic or endothermic.

Front

What is the enthalpy (ΔH) of the reaction in the example?

Back

80 kJ.

Front

Define Synthesis Reaction.

Back

A type of chemical reaction where two or more simple substances combine to form a more complex product. Example: A + B → AB.

Front

What is a Combustion Reaction?

Back

A chemical reaction that occurs when a substance combines with oxygen, releasing energy in the form of light or heat. Example: CH4 + 2O2 → CO2 + 2H2O.