Thermodynamics
What is the SI unit of pressure?
Pascal (Pa)
Newton (N)
Celsius (°C)
Joule (J)
How does adding salt to water alter boiling point elevation when using this solution under standard atmospheric conditions?
Boiling point elevates due to increased solute concentration causing greater impediment for solvent surface escape.
Boiling point decreases because dissolved ions enhance water molecule liberation by lowering cohesive forces among them.
Boiling point variations depend solely on external pressures applied regardless of solute presence or concentration levels within solvent.
Boiling point remains unaltered as salt does not influence vapor pressure significantly enough at macroscopic scales.
If a gas occupies a volume at standard temperature and pressure, what is this reference pressure usually considered to be?
0.98066 Pa
101.325 kPa
0 Pa
100 kPa
What happens to the total resistance in a series circuit when another resistor with resistance is added?
The total resistance increases by half of .
The total resistance increases by .
The total resistance decreases by .
The total resistance remains unchanged.
When two objects are placed in thermal contact and reach thermal equilibrium, what can be said about their temperatures?
They stop exchanging energy as heat completely.
Their internal energies are equal.
Their heat capacities become identical.
Their temperatures are equal.
What effect would doubling both capacitance C and frequency f have on the reactance Xc of a capacitor within an AC circuit?
Reactance would quadruple as both factors that determine reactance are being doubled.
Reactance would double since increasing frequency normally increases capacitive reactance.
The reactance would not change because and doubling C while also doubling f cancel out each other.
Reactance would halve since increasing capacitance decreases capacitive reactance.
Which variable remains constant during an isothermal process for an ideal gas?
Volume
Number of particles
Pressure
Temperature

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If a sealed container filled with an ideal gas is heated from 300K to 600K, which modification will most accurately determine the change in pressure assuming the volume remains constant?
Replace the ideal gas with a real gas before heating.
Use a digital pressure sensor capable of detecting small changes in pressure.
Decrease the amount of ideal gas in the container before heating.
Increase the volume of the container to observe larger pressure changes.
What final equilibrium condition must be met when two substances at different initial temperatures reach thermal equilibrium without phase change or chemical reaction?
They must have identical final temperatures but not necessarily equal amounts of heat transferred or equal changes in internal energy.
Their molecules achieve uniform average kinetic energy across both substances after sufficient time has passed for interaction.
They must adjust their states so that their entropies are maximized within constraints set by conservation laws.
They transfer equal amounts of heat between them until no net heat flow occurs between them anymore.
What is the term for the transfer of energy due to a temperature difference?
Heat
Work
Power
Impulse