Classmates
Review
Hess's Law
∆ H
Calorimetry
100
This person loves a certain witch.
Who is Lloyd?
100
The equation for dilution.
What is M1V1= M2V2.
100
This principle states that the enthalpy change for a reaction is independent of the pathway taken and depends only on the initial and final states.
What is Hess's Law?
100
This term describes the change in enthalpy.
What is ΔH?
100
The following definition describes energy in bonds.
What is bond energy?
200
This person plays tennis.
Who is Aspen, Daniel, or Fern?
200
The bond angle for a tetrahedral molecule.
What is 109.5 degrees?
200
Hess’s Law allows the calculation of this value for a reaction when it cannot be measured directly by a lab.
What is the standard enthalpy change of a reaction (or ΔH°)?
200
This definition explains the meaning of “enthalpy change”.
What is the heat of a process when pressure is held constant?
200
This lab was the one we produced for our calorimetry unit.
What was the Smores/Marshmallow Lab?
300
This person climbs cell towers.
Who is Woodrow?
300
The highest boiling point of the following: I2, Br2, and Cl2.
What is I2.
300
This term describes a reaction where the total enthalpy change is positive, indicating energy absorption.
What is an endothermic reaction?
300
This variable can be roughly calculated from the average bond energies.
What is ΔHrxn?
300
Roasting a marshmallow is this reaction.
What is endothermic?
400
This person want to go to culinary school.
Who is Alex?
400
Identify the base in this ionic equation:
H2SO4(aq.) + 2 KOH(aq.) → K2SO4(aq.) + 2 H2O(l)
What is (KOH) potassium hydroxide?
400
To apply Hess’s Law correctly, you must do this to the enthalpy change when a chemical equation is reversed.
What is change the sign of ΔH?
400
This term describes the amount of heat change when 1 mole of a compound is formed from its elements in their standard state.
What is Standard Enthalpy of Formation or (ΔHfº)?
400
This would lead to inaccurate results in the calorimetry experiment.
What is inaccurate measurements or heat escaping?
500
This person’s middle name is Lannes.
Who is Aspen?
500
What is a first order reaction?
500
Using Hess’s Law, the enthalpy change for the combustion of ethane can be determined by combining the enthalpy changes of its formation and this complementary reaction involving carbon dioxide and water.
What is the reverse of the formation of carbon dioxide and water (or the decomposition of combustion products)?
500
The state and chemical formula of mercury’s most stable form.
What is liquid Hg?
500
Calorimetry can be described with the following definition.
What is measuring the heat released/absorbed in a chemical reaction?