Specific Heat and Hess's Law

Front

What does E represent on the graph?

Back

The energy of the products.

Front

What is the change in enthalpy for this reaction?

Back

-100 kJ.

Front

What kind of reaction is this?

Back

Exothermic.

Front

What is the standard enthalpy change for the reaction CO(g) + H2O(g) ⇌ CO2(g) + H2(g)?

Back

−42 kJ mol−1.

Front

Calculate the ∆H for the reaction: 2H2O2 → 2H2O + O2 using Hess's Law.

Back

∆H = -196 kJ.

Front

Define specific heat capacity.

Back

The amount of heat required to raise the temperature of 1 gram of a substance by 1 degree Celsius.

Front

What is Hess's Law?

Back

The total enthalpy change for a reaction is the sum of the enthalpy changes for individual steps, regardless of the pathway taken.

Front

What is an exothermic reaction?

Back

A reaction that releases energy in the form of heat.

Front

What is an endothermic reaction?

Back

A reaction that absorbs energy from its surroundings.

Front

How do you calculate the change in enthalpy (∆H)?

Back

∆H = H(products) - H(reactants).