Thermochemical Equations Flashcard

Front

What type of reaction occurs when energy is released as heat?

Back

Exothermic

Front

What happens when chemical bonds are broken?

Back

Energy is absorbed

Front

What does a combustion reaction always produce?

Back

Carbon dioxide and water

Front

What is the ΔH value for an exothermic reaction?

Back

Negative

Front

What is the fuel used in most gasoline-powered race cars?

Back

Octane

Front

Which fuel releases the most energy per mole? Options: Ethanol, Octane, Dodecane, Methane

Back

Dodecane

Front

What is calorimetry used to measure?

Back

The heat transferred during a chemical reaction

Front

How does a calorimeter determine heat change?

Back

By tracking temperature changes in water

Front

What is the unit for enthalpy change (ΔH)?

Back

Joules

Front

What type of reaction absorbs heat from the surroundings?

Back

Endothermic