Classmates
Silvio
What is Kinetics?
Rate of Reaction
What is Hess’s law?
Hess’s law states that the energy change in an overall chemical reaction is equal to the sum of the energy changes in the individual reactions comprising it.
This symbol represents the change of enthalpy in a chemical reaction.
Delta H
What is the equation for Calorimetry?
q=m c delta t
Who does roller derby?
Fiona
Name one factor that affects reaction rates.
Temperature
Physical state of the reactants
Surface Area / Particle size
Concentration of the “reactants”
Nature of the reactants
Catalyst
What is H in Hess’s law?
H represents enthalpy
If delta H is negative, what type of reaction is it?
Exothermic
What is the definition of Calorimetry?
The scientific method of measuring the change in energy of a system
Who in this group is in a band?
Silvio
Is Soap acidic, basic, or neutral
Basic
What is Hess’s law used to calculate in a reaction?
Enthalpy Change
What unit is delta H measured in?
Joules (J) or Kilojoules (KJ)
What is the enthalpy of formation of a substance?
The energy required to form 1 mole of a substance from elements at standard state.
Are cats or dogs more popular among the class?
Cats
What IMFs does H2O have?
London-dispersion, dipole dipole, hydrogen bonding
What process can Hess’s law be used to calculate the enthalpy where a hydrocarbon reacts with oxygen?
Combustion
The delta H for this process describes the energy required to convert a liquid into a gas.
Vaporization
What is the heat capacity of water often used in calorimetry experiments?
4.18J/C
What month was Ivy born in?
What is the hybridization of CH4 (Methane)?
Sp3
Who founded Hess’s law?
Germain Henri Hess
For a reaction at constant pressure, delta h is equivalent to this quantity.
Heat transferred (q)
What is the Name Calorimetry derived from?
The Latin word for heat (calor), and the Latin term to measure (metro)