Chemical Reactions

Front

Which of the following is NOT a description of an Endothermic reaction?

• The temperature decreases
• Energy is absorbed
• Energy is released
• Takes more energy to break the bonds than is released

Back

Energy is released

Front

Which of the options below is NOT a chemical change? Options: Cooking, Digestion, Phase Change, Rusting

Back

Phase Change

Front

Why does a chemical change occur?

Back

A chemical reaction has occurred

Front

Which option below is an example of an Exothermic reaction? Options: Fireworks, Photosynthesis, Cold pack, Potassium chloride in water

Back

Fireworks

Front

Which factor does NOT increase the rate (speed) of a chemical reaction? Options: Increasing concentration, Increasing temperature, Increasing surface area, Increasing inhibitor

Back

Increasing inhibitor

Front

How can you increase the rate (speed) of a chemical reaction?

Back

Get more reactant particles together more often

Front

What does the Law of Conservation of Mass state?

Back

Matter is neither created nor destroyed, therefore the number of atoms in reactants will be identical to the number of atoms in the products.

Front

Mass of reactants: 32g + 8g. What is the mass of the products?

Back

40 grams

Front

Atoms of each element in 2Na₂SO₄?

Back

4 Na, 2 S, 8 O

Front

How many atoms of each element on the reactant side of the equation? Options: 4 C, 6 H, 14 O; 2 C, 6 H, 2 O; 4 C, 12 H, 7 O; 4 C, 12 H, 14 O

Back

4 C, 12 H, 14 O