energy changes quiz 1

In an exothermic reaction, heat is ...

• taken in or absorbed

• given out or released

In an endothermic reaction, heat is ...

• taken in or absorbed

• given out or released

What type of reaction occurs in a hand warmer?

• exothermic

• endothermic

Is photosynthesis an exothermic or endothermic reaction?

• Endothermic

• Exothermic

• Neither

If a chemical reaction is EXOTHERMIC, the temperature would....

• remains the same

• increases

• decreases

What gas is always produced when a metal reacts with water?

• Oxygen

• Carbon dioxide

• Hydrogen

• Carbon monoxide

What metal hydroxide is produced when magnesium reacts with water?

• Copper hydroxide

• Magnesium oxide

• Magnesium

• Magnesium hydroxide

An acid reacts with metal to produce...

• Carbon dioxide

• Hydrogen gas

• Salt and hydrogen gas

• Hydrogen gas and water

If potassium reacts with water what are the 2 products of the reaction?

• potassium hydroxide + oxygen

• potassium hydroxide + hydrogen

• potassium + hydrogen oxide

• Potassium hydroxide + hydrogen oxide

When a metal reacts with an acid, as a result the temperature of the products decreases.

• true

• false