Studied by 10 people
Exothermic
________ is when energy is transferred from the system to the surroundings, such as when a chemical reaction occurs in a beaker and the beaker feels hot.
Hess’s Law
________ states that if a reaction can be broken into a series of steps, the sum of the ΔH of those steps are equal to the ΔH of the reaction.
Enthalpy change
________ is the measure of energy that is released or absorbed when bonds are broken /formed.
Temperature
________ remains constant during a phase change.
Calorimetry
________ is the measurement of heat changes during a chemical reaction.
Enthalpy of vaporization
________ is how much energy is required to turn a liquid to a gas.
Endothermic reactions
________ occur when a system absorbs the energy from the surroundings, such as when a beaker feels cold.
Vapor pressure
________ is the amount of pressure given off by molecules as they go from solid /liquid to gas.
heat of vaporization
The ________ is the energy given off when a gas condenses.
Hydration energy
________ is a Coulombic energy and its magnitude increases as the ions increase their charge or decrease the size.
released
When bonds are formed, energy is ____.
Enthalpy of fusion
________ is the amount of energy required to cause a solid to melt.
absorbed
When bonds are broken, energy is _____.
Solid to gas
sublimation
Gas to solid
deposition
ΔH
Enthalpy change
ΔHf°
Enthalpy of formation
Enthalpy of formation
The amount of energy released when one mole of a compound is made from pure substances
Vapor pressure
Molecules that go from solid/liquid to gas emit ________.
Endothermic
________ is when energy is transferred from the surrounding to the system, such as when a chemical reaction occurs in a beaker and the beaker feels cold.
Enthalpy of formation of O2
Zero
Enthalpy of formation of graphite
Zero
Enthalpy of formation of diamond
1.9 kJ / mole
Bimolecular
elementary reaction with two particles
Nature of reactant
Reaction between simple ions are usually instataneous
Note 
Flashcard (20)