Podcast
Questions and Answers
What is the equation for work during reversible expansion of an ideal gas?
What is the equation for work during reversible expansion of an ideal gas?
Vf w rev = - ∫ pin dV
What is the work done during isothermal expansion of an ideal gas into a vacuum?
What is the work done during isothermal expansion of an ideal gas into a vacuum?
Zero (w = 0)
For an isothermal irreversible change of an ideal gas, what is the relationship between heat and work?
For an isothermal irreversible change of an ideal gas, what is the relationship between heat and work?
q = -w = pex (Vf - Vi)
What is the expression for pressure in terms of volume for an ideal gas?
What is the expression for pressure in terms of volume for an ideal gas?
What is the work done during adiabatic change of an ideal gas?
What is the work done during adiabatic change of an ideal gas?
In the given scenario, how much heat is absorbed and how much work is done during the isothermal expansion of the gas?
In the given scenario, how much heat is absorbed and how much work is done during the isothermal expansion of the gas?
What is the quantity of heat absorbed by the calorimeter in an exothermic reaction?
What is the quantity of heat absorbed by the calorimeter in an exothermic reaction?
What does a negative value of qp indicate in a reaction?
What does a negative value of qp indicate in a reaction?
What is the formula for calculating the quantity of heat from a reaction?
What is the formula for calculating the quantity of heat from a reaction?
What does a positive value of qp indicate in a reaction?
What does a positive value of qp indicate in a reaction?
What is the enthalpy change for the combustion of 1 mol of graphite?
What is the enthalpy change for the combustion of 1 mol of graphite?
What is the relationship between ∆U and ∆H when ∆ng = 0?
What is the relationship between ∆U and ∆H when ∆ng = 0?
What is the reason why reactions are often carried out at high temperature?
What is the reason why reactions are often carried out at high temperature?
What is the natural direction of a spontaneous change in an isolated system?
What is the natural direction of a spontaneous change in an isolated system?
How does the second law of thermodynamics explain the common occurrence of spontaneous exothermic reactions?
How does the second law of thermodynamics explain the common occurrence of spontaneous exothermic reactions?
What are the three types of molecular motions that contribute to entropy increase with rising temperature?
What are the three types of molecular motions that contribute to entropy increase with rising temperature?
What happens to entropy when the temperature of a system rises?
What happens to entropy when the temperature of a system rises?
What happens to entropy when the temperature of a system is lowered?
What happens to entropy when the temperature of a system is lowered?
What is entropy in the context of thermodynamics?
What is entropy in the context of thermodynamics?
How does entropy change in relation to the disorder in an isolated system?
How does entropy change in relation to the disorder in an isolated system?
What does an increase in entropy in a chemical reaction signify?
What does an increase in entropy in a chemical reaction signify?
How can entropy change be estimated qualitatively in a chemical reaction?
How can entropy change be estimated qualitatively in a chemical reaction?
What state of a substance has the lowest entropy?
What state of a substance has the lowest entropy?
Which state of a substance has the highest entropy?
Which state of a substance has the highest entropy?
What is the standard enthalpy of formation of NH3 gas?
What is the standard enthalpy of formation of NH3 gas?
Calculate the standard enthalpy of formation of CH3OH(l) using the given data.
Calculate the standard enthalpy of formation of CH3OH(l) using the given data.
Calculate the enthalpy change for the process CCl4(g) → C(g) + 4 Cl(g) and the bond enthalpy of C – Cl in CCl4(g).
Calculate the enthalpy change for the process CCl4(g) → C(g) + 4 Cl(g) and the bond enthalpy of C – Cl in CCl4(g).
For an isolated system with ∆U = 0, what is the value of ∆S?
For an isolated system with ∆U = 0, what is the value of ∆S?
At what temperature will the reaction 2A + B → C become spontaneous given ∆H and ∆S values?
At what temperature will the reaction 2A + B → C become spontaneous given ∆H and ∆S values?
What are the signs of ∆H and ∆S for the reaction 2 Cl(g) → Cl2(g)?
What are the signs of ∆H and ∆S for the reaction 2 Cl(g) → Cl2(g)?
Calculate ∆G for the reaction 2 A(g) + B(g) → 2D(g) and predict its spontaneity.
Calculate ∆G for the reaction 2 A(g) + B(g) → 2D(g) and predict its spontaneity.
