PHYSICAL CHEMISTRY FINAL EXAM REVISION QUESTIONS 2024/2025. THE LATEST REVISION QUESTIONS AND CORRECT ANSWERS IN 2024/2025. (ALREADY GRADED A+) (LATEST 2024 UPDATE)

PHYSICAL CHEMISTRY FINAL EXAM REVISION QUESTIONS 2024/2025. THE
LATEST REVISION QUESTIONS AND CORRECT ANSWERS IN 2024/2025.
(ALREADY GRADED A+) (LATEST 2024 UPDATE)




Isolated system - ANSWER- system cannot exchange mater nor energy with the rest of the

universe


Closed system - ANSWER- system can exchange energy but not matter with the rest of the

universe


Open system - ANSWER- System can exchange energy and matter with the rest of the universe


First law of thermodynamics - ANSWER- energy in the initial state contained in the system

and the rest of the universe is equal to the energy in the final state of the system and the rest of the

universe


Work - ANSWER- force x displacement


Integral of Fext*dx


Internal energy (U) for an ideal gas - ANSWER- -particles are just points, no V associated.


-collide elastically w/themselves and w/walls

-no intermolecular or interatomic interactions

-no potential energy of reaction, kinetic energy is only source of energy

U=q+w

, Heat capacity (C) - ANSWER- the amount of heat needed by the system to increase its

temperature by 1K.

Molar heat capacity: J/mol*K heat capacity/moles


Real gas equation - ANSWER-


Intermolecular interaction energies - ANSWER- F is proportional to q1q2/r^2


Adiabatic process - ANSWER- q=0


DeltaU = q + w = (3/2)(nRDeltaT)

w = -(3/2)(nRDeltaT)


Isothermal process - ANSWER- DeltaU = 0 = q + w


q = -w

q = nRTln(v2/v1)


Isochoric process - ANSWER- DeltaU = (3/2)nRDeltaT = q


Isobaric process - ANSWER- Constant pressure


The Carnot Cycle - ANSWER-


Isothermal reversible expansion - ANSWER- (see study guide)


w = -integral from V1 to V2 pdV

...