PHA 317 Quiz 2 Review Questions with Correct Answers Latest Update 2025/2026
in what way does the equilibrium constant for a chemical reaction depend on the molar
concentrations of the products obtained - Answers directly proportional
if a chemical reaction requires heat energy to proceed, it is called - Answers endothermic
reaction
the entropy of a pure crystalline substance is zero at absolute zero according to - Answers third
law of thermodynamics
the molar capacity of a system is defined as the heat required to raise the temp of 1 mole of a
substance by 1 degree - Answers True
enthalpy (H) of a system is best expressed as where E = internal energy, P = pressure, T= temp
in Kelvin, q= heat, C=heat capacity - Answers E + PV
the concept of latent heat is valid only if the heat absorbed or released by a system is resulting
into its change phase - Answers true
what would be the internal energy of a system which is absorbing heat adiabatically? - Answers
the internal energy of the system will decrease
a process, where the heat transfer is zero, is called - Answers adiabatic process
select the correct statements involving 2nd law of thermodynamics - Answers the entropy
change of irreversible thermodynamic processes is always positive
Van't Hoff equation relates - Answers the equilibrium constant of a reaction to the reaction
temperature
a process called isothermal, if it takes place at - Answers a constant temperature
which of the following laws state that 'heat change associated with any reaction is independent
of the number of steps in which the reaction occurs" - Answers Hess's law
Hemholt'z free energy equation should be used when a change in state is taking place at
constant pressure - Answers false
in a physical or chemical process, if absorption of heat occurs it is called exothermic reaction -
Answers false
applications of free energy functions are
1. calculation of equilibrium constant
2. hess law of constant heat summation
in what way does the equilibrium constant for a chemical reaction depend on the molar
concentrations of the products obtained - Answers directly proportional
if a chemical reaction requires heat energy to proceed, it is called - Answers endothermic
reaction
the entropy of a pure crystalline substance is zero at absolute zero according to - Answers third
law of thermodynamics
the molar capacity of a system is defined as the heat required to raise the temp of 1 mole of a
substance by 1 degree - Answers True
enthalpy (H) of a system is best expressed as where E = internal energy, P = pressure, T= temp
in Kelvin, q= heat, C=heat capacity - Answers E + PV
the concept of latent heat is valid only if the heat absorbed or released by a system is resulting
into its change phase - Answers true
what would be the internal energy of a system which is absorbing heat adiabatically? - Answers
the internal energy of the system will decrease
a process, where the heat transfer is zero, is called - Answers adiabatic process
select the correct statements involving 2nd law of thermodynamics - Answers the entropy
change of irreversible thermodynamic processes is always positive
Van't Hoff equation relates - Answers the equilibrium constant of a reaction to the reaction
temperature
a process called isothermal, if it takes place at - Answers a constant temperature
which of the following laws state that 'heat change associated with any reaction is independent
of the number of steps in which the reaction occurs" - Answers Hess's law
Hemholt'z free energy equation should be used when a change in state is taking place at
constant pressure - Answers false
in a physical or chemical process, if absorption of heat occurs it is called exothermic reaction -
Answers false
applications of free energy functions are
1. calculation of equilibrium constant
2. hess law of constant heat summation
