Chemistry Quiz: Enthalpy and Real Gases

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What does the heat of sublimation involve?

The change in phase from liquid to gas

The energy released in a chemical reaction

The change in phase from solid to gas (correct)

The change in phase from solid to liquid

How is a specific property defined?

Is an extensive property multiplied by mass

Defines a specific variable (e.g., temperature) (correct)

Is independent of mass

Is dependent on the phase of the substance

What is the definition of a material's specific heat?

The ratio of heat required to change the temperature of mass by a change in temperature (correct)

Being different for constant pressure and constant temperature processes

A function of temperature

All of the above

What do properties having to do with equilibrium conditions, such as Gibbs and Helmholtz functions, refer to?

Properties having to do with equilibrium conditions, such as the Gibbs and Helmholtz functions Signup and view all the answers

In a saturated vapor, what is the relationship between temperature and pressure?

Constant Signup and view all the answers

How are properties of a superheated vapor characterized?

Properties beyond those of a saturated vapor Signup and view all the answers

What is the best definition of enthalpy?

The amount of useful energy in a system Signup and view all the answers

Which statement is not true for real gases?

Real gases are found only rarely in nature Signup and view all the answers

When is the stagnation state called the isentropic stagnation state?

Reversible as well as adiabatic Signup and view all the answers

During which process does the entropy of a fluid remain constant?

Isentropic stagnation process Signup and view all the answers

Which of the following processes is irreversible?

An isentropic deceleration of a moving perfect fluid Signup and view all the answers

What does the heat of vaporization involve?

The change in phase liquid to gas Signup and view all the answers

What happens during the stagnation process in fluid mechanics?

Increase in temperature and pressure Signup and view all the answers

What is a system composed of ice and water at 0°C said to be?

In thermodynamic equilibrium Signup and view all the answers

Which term is used to describe the properties of a fluid at the stagnation state?

Isothermally Signup and view all the answers

When does a liquid boil?

When its vapor pressure equals the ambient pressure Signup and view all the answers

Which of the following is NOT considered a thermodynamic property?

Mass Signup and view all the answers

Chemistry Quiz: Enthalpy and Real Gases

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