11.1 Thermochemistry

What is collision theory?

The unstable cluster of atoms that exists during the transition from reactants to products. 

Heat transfer occurs (Heat travels from...)

When ice is dropped into warm cup of water, it begins to melt. What is the system?

A reaction that gives out energy to the surroundings causes the surroundings ....

The enthalpy change is a negative (-) value, what side of the equation will the energy value be on.

In the reaction picture, the energy will be on product or reactant

Using the equations below:

C(s) + O₂(g) → CO₂(g) ∆H = –390 kJ

Mn(s) + O₂(g) → MnO₂(s) ∆H = –520 kJ

what is ∆H (in kJ) for the following reaction?

MnO₂(s) + C(s) → Mn_(s) + CO₂(g)

Consider the following equations.

Mg(s) + O₂(g) → MgO(s) ∆H = –602 kJ

H₂(g) + O₂(g) → H₂O(g) ∆H = –242 kJ

What is the ∆H value (in kJ) for the following reaction?

MgO(s) + H₂(g₎ → Mg(s) + H₂O(g)