Thermochemistry

Front

What phase of matter is typically found at high temperatures and low pressures?

Back

Gas

Front

What type of reaction releases heat energy?

Back

Exothermic reaction

Front

What is the term for a reaction that absorbs heat energy?

Back

Endothermic reaction

Front

What is sublimation?

Back

The process where a solid turns directly into a gas without becoming a liquid.

Front

What is the balanced thermochemical equation for the combustion of C2H4?

Back

C2H4 (g) + 3O2 (g) → 2CO2 (g) + 2H2O (g) ΔH_comb = -1411 kJ/mol

Front

How much heat energy is released when a snack item with 180 Calories is broken down?

Back

753,120 Joules

Front

What is the definition of thermochemistry?

Back

The study of the heat energy associated with chemical reactions and changes of state.

Front

What is the significance of ΔH in a chemical reaction?

Back

ΔH represents the change in enthalpy, indicating whether a reaction is endothermic or exothermic.

Front

What is the process of freezing?

Back

The transition from liquid to solid, releasing heat energy.

Front

What is condensation?

Back

The process where gas turns into liquid, releasing heat energy.