Chemistry - Enthalpy

Front

How do you calculate Enthalpy of a reaction?

Back

ΔH = ΔH_products - ΔH_reactants

Front

Define 'Enthalpy'

Back

Energy stored in the chemical bonds in a substance.

Front

In a chemical reaction, where is the energy typically found?

Back

In the products.

Front

What is the SI unit of heat and energy?

Back

Joule.

Front

In a reaction with heat (+177.8 KJ), is the heat a product or a reactant?

Back

Product.

Front

What does ΔH represent in a chemical reaction?

Back

The change in enthalpy.

Front

What is the relationship between enthalpy and temperature?

Back

Enthalpy changes can be affected by temperature changes.

Front

What is the significance of a negative ΔH value?

Back

It indicates that the reaction is exothermic, releasing heat.

Front

What is the significance of a positive ΔH value?

Back

It indicates that the reaction is endothermic, absorbing heat.

Front

What is the formula for calculating heat (q) in a reaction?

Back

q = mCΔT, where m is mass, C is specific heat, and ΔT is the change in temperature.