Reteach and Remediate: Matter/Energy

Front

What is the Law of Conservation of Mass?

Back

The Law of Conservation of Mass states that matter cannot be gained or lost in a chemical reaction.

Front

What is the chemical equation for the reaction of Aluminum and Bromine?

Back

The balanced equation is: 2 Al + 3 Br2 -> 2 AlBr3.

Front

What does an exothermic reaction do to temperature?

Back

An exothermic reaction releases energy, causing the temperature of the surroundings to rise.

Front

In a circuit, how does energy change as it moves from the battery to the light bulb?

Back

The energy changes from chemical (in the battery) to electrical (in the wires) to light (in the bulb).

Front

What type of bond is present in SiO2?

Back

SiO2 has a covalent bond.

Front

What is an exothermic reaction?

Back

An exothermic reaction is a chemical reaction that releases energy in the form of heat.

Front

What is the difference between ionic and covalent bonds?

Back

Ionic bonds involve the transfer of electrons, while covalent bonds involve the sharing of electrons.

Front

What is the formula for calculating the energy change in a chemical reaction?

Back

Energy change = Energy of products - Energy of reactants.

Front

What is the significance of a glowing light bulb in a circuit?

Back

A glowing light bulb indicates that electrical energy is being converted into light energy.

Front

What happens to temperature in an endothermic reaction?

Back

In an endothermic reaction, the temperature of the surroundings decreases as energy is absorbed.