Thermodynamics Flashcards
(34 cards)
What is a system
It is part of the universe used for thermodynamic study
What is surrounding
It is the remaining part of the universe around the system
What is an isothermal process
if temperature of system remains constant dyring various operations
What is adiabatic process
Process where there is no heat exchange between the system and surroundings in any step
What is isobaric process
The pressure during the process remains constant
What is isochoric process
It is when the volume of the system remains constant during the process
What is cyclic process
It is when the system returns to its original state after completing a series of steps
What is a reversible process
A process where each step is in an equilibrium state and can be reversed back to its original state
What is an irreversible process
A rapid process which does not allow the system to attain equilibrium at each state, thus is irreversible
What is internal energy
It is the total energy stored in a system in different forms like potential, chemical, etc.
What is zeroth law of thermodynamics
If two thermodynamic systems are both in thermal equilibrium with a third system, then the two systems are in thermal equilibrium with each other.
What is the first law of thermodynamics
The total mass and energy of an isolated system remains unchanged
ΔU = heat added + work done
What is enthalpy
It is the total heat content of the system at constant pressure
H = U + PV
What is heat capacity
It is the heat required to raise the temperature of a body by 1K
What are the two types of heat capacity
- Constant volume - dU/dT
- Constant pressure - dH/dT
What is the enthalpy of reaction
It is the total amount of heat released or absorbed when the number of moles of the reactants reacts completely to form products in a balanced chemical equation
What is the standard enthalpy of formation
The enthalpy when one mole of a substance is formed from its elements in their standard state
What is enthalpy of solution
It is the heat change when one mole of a solute is dissolved in large excess of solved so that further dilution causes no heat change
What is integral heat of solution
It is the enthalpy change when one mole of solute is dissolved in a specific amount of solvent
What is inergral heat of dilution
It is the net change of enthalpy when a solution containing one mole of solute at a known concentration and diluted again by adding more solvent to get another concentration
What is enthalpy of hydration
The enthalpy change when one mole of an anhydrous salt combines with water to form its hydrate
What is enthalpy of neutralization
It is the enthalpy change when one gram of acid is neutralized by base or vice versa in their dilute forms
What is enthalpy of combustion
It is the enthalpy change when one mole of substance undergoes complete combustion
What is bond energy/enthalpy
It is the amount of energy required to break a bond between atoms in gaseous state
