Basic Thermodynamics Lowersixth Science Physics

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Test basics of equilibrium and first law ideas.

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YAKILI LMS

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Basic Thermodynamics Lowersixth Science Physics


Froggy Jumps Basic Thermodynamics Lowersixth Science PhysicsOnline version Test basics of equilibrium and first law ideas. by YAKILI LMS 1 What does the Zeroth Law of Thermodynamics state? a If two systems are each in thermal equilibrium with a third, they are in thermal equilibrium with ea b Heat flows from cold to hot spontaneously. c Energy cannot be created or destroyed in any process. 2 What is thermodynamic equilibrium? a A state with constant heat flow b A state with increasing pressure c A state where macroscopic properties are unchanging with time 3 Which quantity remains constant in a reversible isothermal process for ideal gas? a Internal energy b Entropy c Temperature 4 Zeroth law helps define what physical property? a Temperature b Volume c Pressure 5 Which of the following best describes a thermodynamic system in equilibrium? a Rapid phase change occurring b Continuous heat transfer c No net macroscopic changes occur over time 6 In an isothermal process, what is constant for an ideal gas? a Temperature b Volume c Pressure 7 What does the first law of thermodynamics relate? a Entropy change to temperature b Change in internal energy to heat added and work done c Pressure change to volume change 8 Internal energy of an ideal gas depends on what? a Pressure only b Volume only c Temperature only 9 If you compress an ideal gas reversibly at constant T, what happens to Q and W? a All heat becomes new energy b Heat added is partially converted to work c No work is done 10 Which diagram helps determine work done during a PV process? a Slope of the curve b Height of the curve c Area under the PV curve 11 For a PV diagram, which axis shows pressure? a Both axes b Y-axis c X-axis 12 Isothermal expansion of an ideal gas does what to volume and temperature? a Volume decreases, temperature increases b Volume increases, temperature constant c Volume constant, temperature decreases 13 What is the work done during a PV process? a W = ∫ V dP b W = ∫ P dV c W = ∫ T dS 14 First law in differential form expresses: a dS = δQ/T b dH = δQ + δW c dU = δQ − δW 15 What happens to internal energy during a perfectly insulated, free expansion is: a Increases b Decreases c Remains constant 16 Which process is isothermal for an ideal gas? a Constant volume, changing T b Any process with constant T c Constant pressure, changing T 17 In a PV diagram, a vertical rise indicates which change? a Volume unchanged, pressure changes b Volume change without pressure change c Temperature change 18 If a gas releases heat while doing work, what is the sign of δQ and δW? a δQ negative, δW positive b δQ positive, δW negative c Both positive 19 What is the relationship between energy change and work in a cycle? a Net energy equals area b No work is done in a cycle c Net work equals area enclosed on PV diagram 20 Which law introduces the concept of internal energy change? a Second law of Thermodynamics b Zeroth law of Thermodynamics c First law of Thermodynamics 21 In an isothermal process for an ideal gas, entropy change is: a Positive or negative depending on direction b Always positive c Always zero 22 What is the unit of work in thermodynamics? a Joule b Newton c Watt 23 State the definition of a reversible process. a Can be reversed with no net change b Always produces entropy increase c Irreversible under any condition 24 What is the isothermal condition for a gas? a Constant pressure b Constant volume c Constant temperature 25 Which quantity is path dependent? a Work b Temperature c Internal energy 26 What does a PV diagram show? a Temperature vs Time b Pressure vs Volume c Energy vs Entropy 27 Which law introduces a concept that temperature is well defined? a First Law b Second Law c Zeroth Law 28 In an isothermal compression of an ideal gas, what happens to volume? a Volume decreases while T constant b Volume constant c Volume increases 29 What is the sign of ΔU for an ideal gas during isothermal process? a Positive b Zero c Negative 30 If heat added equals work done by system, what is ΔU? a Zero b Positive c Negative 31 Which statement describes internal energy? a Energy stored due to microscopic motions b Energy due to macroscopic motion only c Energy of surroundings 32 Which process is most associated with isothermal curves on PV diagram? a Vertical lines b Horizontal lines c Hyperbolic P-V curves 33 Which quantity remains unchanged in a perfect adiabatic process? a Heat transfer δQ = 0 b Temperature c Work done 34 What is the primary focus of thermodynamic equilibrium? a Rate of chemical reactions b Total energy conservation c Stability of macroscopic properties 35 If two bodies in contact reach the same temperature, they are in: a Chemical equilibrium b Thermal equilibrium c Mechanical equilibrium 36 What is the area under a P-V curve representing? a Change in entropy b Work done by/on the system c Heat transferred 37 Which of the following is true for an isothermal ideal gas process? a Pressure constant b Volume constant c Temperature remains constant 38 During a reversible process, entropy change of the universe is: a Zero b Negative c Positive 39 First law can be written as: a ΔS = Q/T b ΔH = Q + W c ΔU = Q − W 40 What is the work done if a gas expands against a constant external pressure po? a W = ∫ P dT b W = po (Ti − Tf) c W = po (Vf − Vi) 41 Which process cools the surroundings when gas is compressed isothermally? a Isothermal compression b Adiabatic expansion c Isochoric heating 42 How is heat transfer denoted in the first law? a δQ b dU c δW 43 What does a PV diagram illustrate? a Pressure vs Volume relationship b Power vs Velocity c Mass vs Energy 44 What does the zeroth law of thermodynamics state? a Entropy always decreases. b Energy cannot be created or destroyed. c If two bodies are in thermal equilibrium with a third, they are in equilibrium with each other. 45 What is thermal equilibrium? a Temperature must be absolute zero. b Two bodies exchange no net heat until temperatures equalize c Pressure must be equal. 46 What is the first law's form for a closed system? a DeltaU = Q + W b DeltaU = Q − W c PΔV = Q − W 47 Isothermal process for an ideal gas means what happens to U? a Q = 0 b DeltaU = 0 c DeltaU increases 48 In a PV diagram, how is the work done by a gas represented? a Area under the curve b Slope of the curve c Peak pressure value 49 First law relation: if heat is added and work is done by the system, what is Q? a Q = PΔV b Q = DeltaU + W c Q = DeltaU − W 50 Which heat transfer method does not need a medium? a Conduction b Radiation c Convection

Basic Thermodynamics Lowersixth Science Physics

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Basic Thermodynamics Lowersixth Science PhysicsOnline version

by YAKILI LMS

What does the Zeroth Law of Thermodynamics state?

What is thermodynamic equilibrium?

Which quantity remains constant in a reversible isothermal process for ideal gas?

Zeroth law helps define what physical property?

Which of the following best describes a thermodynamic system in equilibrium?

In an isothermal process, what is constant for an ideal gas?

What does the first law of thermodynamics relate?

Internal energy of an ideal gas depends on what?

If you compress an ideal gas reversibly at constant T, what happens to Q and W?

Which diagram helps determine work done during a PV process?

For a PV diagram, which axis shows pressure?

Isothermal expansion of an ideal gas does what to volume and temperature?

What is the work done during a PV process?

First law in differential form expresses:

What happens to internal energy during a perfectly insulated, free expansion is:

Which process is isothermal for an ideal gas?

In a PV diagram, a vertical rise indicates which change?

If a gas releases heat while doing work, what is the sign of δQ and δW?

What is the relationship between energy change and work in a cycle?

Which law introduces the concept of internal energy change?

In an isothermal process for an ideal gas, entropy change is:

What is the unit of work in thermodynamics?

State the definition of a reversible process.

What is the isothermal condition for a gas?

Which quantity is path dependent?

What does a PV diagram show?

Which law introduces a concept that temperature is well defined?

In an isothermal compression of an ideal gas, what happens to volume?

What is the sign of ΔU for an ideal gas during isothermal process?

If heat added equals work done by system, what is ΔU?

Which statement describes internal energy?

Which process is most associated with isothermal curves on PV diagram?

Which quantity remains unchanged in a perfect adiabatic process?

What is the primary focus of thermodynamic equilibrium?

If two bodies in contact reach the same temperature, they are in:

What is the area under a P-V curve representing?

Which of the following is true for an isothermal ideal gas process?

During a reversible process, entropy change of the universe is:

First law can be written as:

What is the work done if a gas expands against a constant external pressure po?

Which process cools the surroundings when gas is compressed isothermally?

How is heat transfer denoted in the first law?

What does a PV diagram illustrate?

What does the zeroth law of thermodynamics state?

What is thermal equilibrium?

What is the first law's form for a closed system?

Isothermal process for an ideal gas means what happens to U?

In a PV diagram, how is the work done by a gas represented?

First law relation: if heat is added and work is done by the system, what is Q?

Which heat transfer method does not need a medium?