Chem 162 Test 2025 Questions and
Verified Answers
Energy is transferred from the system to the surroundings
Exothermic
Heat is best defined as
energy transferred as a result of a temperature difference
Energy released when chem bonds form
Potential energy
Energy transfer from surrounding to sys
Endothermic
What is unique about state function
the value of a state function depends only on final and initial values
When a portion of a heat curve is horizontal...
Energy added is being used to overcome intermolecular forces (going through phase change)
H_2
Has standard enthalpy of formation of zero
spontaneous process
A process that occurs without an overall input of energy; a process that is energetically
favorable.
In spontaneous process what always increases
entropy of the universe
Entropy
, measure of disorder
Enthalpy
The heat content of a system at constant pressure
Gibbs free energy
energy available to do work
free energy
energy that is available to do work
At 0K, entropy of perfect crystal is
0
Molarity is defined as moles of solute resolved in
1L solution
In dilution, what remains unchanged
Moles in solution
What is a weak electrolyte?
weak acids, weak bases, or ionic compounds that do not readily dissolve in water
What is a strong acid?
An acid that is completely ionised in aqueous solution
When reacting with water, ammonia acts as
A base
Titrant
A solution of known concentration that is used to titrate a solution of unknown concentration
Analyte
Verified Answers
Energy is transferred from the system to the surroundings
Exothermic
Heat is best defined as
energy transferred as a result of a temperature difference
Energy released when chem bonds form
Potential energy
Energy transfer from surrounding to sys
Endothermic
What is unique about state function
the value of a state function depends only on final and initial values
When a portion of a heat curve is horizontal...
Energy added is being used to overcome intermolecular forces (going through phase change)
H_2
Has standard enthalpy of formation of zero
spontaneous process
A process that occurs without an overall input of energy; a process that is energetically
favorable.
In spontaneous process what always increases
entropy of the universe
Entropy
, measure of disorder
Enthalpy
The heat content of a system at constant pressure
Gibbs free energy
energy available to do work
free energy
energy that is available to do work
At 0K, entropy of perfect crystal is
0
Molarity is defined as moles of solute resolved in
1L solution
In dilution, what remains unchanged
Moles in solution
What is a weak electrolyte?
weak acids, weak bases, or ionic compounds that do not readily dissolve in water
What is a strong acid?
An acid that is completely ionised in aqueous solution
When reacting with water, ammonia acts as
A base
Titrant
A solution of known concentration that is used to titrate a solution of unknown concentration
Analyte
