Answers 350CR Integrated ScienceStates of Matter

Second Law of Thermodynamics Answers

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Heat engine X has an efficiency of 67%. Heat engine Y has an efficiency of 82%.

Heat engine X moves more thermal energy from cold to warm areas than heat engine Y.

Heat engine X releases more energy to the surroundings than heat engine Y.

Heat engine Y releases more energy to the surroundings than heat engine Y.

Heat engine Y moves more thermal energy from cold to warm areas than heat engine X.

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Dierdra began writing a summary of the relationship between the first and second laws of thermodynamics.Thermal energy in a system is conserved and can increase the system’s internal energy and/or be used to do work.

Thermal energy moves from cooler objects to warmer objects

Thermal energy moves from warmer objects to cooler objects.

Thermal energy is destroyed when it leaves the system.

Thermal energy is created when it enters the system.

The diagram is a real-world example of the first and second laws of thermodynamics. It shows how thermal energy is used to generate electricity.Which best describes how the diagram illustrates both laws of thermodynamics?

First law: High-temperature steam flows to an area of lower temperature in the turbines.Second law: Thermal energy is used to do work on the turbines.

First law: Thermal energy is used to do work on the turbines.Second law: High-temperature steam flows to an area of lower temperatures in the turbines.

First law: Some thermal energy is lost to the surrounding environment as it travels through the system.Second law: Kinetic energy is used to turn an electrical generator.

First law: Kinetic energy is used to turn an electrical generator. Second law: Some thermal energy is lost to the surrounding environment as it travels through the system.

Which best describes a spontaneous process as it relates to the second law of thermodynamics?

It destroys heat.

It requires work.

It creates energy.

It occurs naturally.

The diagram is being used to illustrate the second law of thermodynamics, where Qh represents a hot object and Qc represents a cold object.

adding in the boxes an arrow that points from Qh to Qc

adding in the boxes an arrow that points from Qc to Qh

adding in the boxes an arrow that points in both directions between Qh and Qc

adding in each box an arrow that points upward from Qh and from Qc

Which is the best example of increasing entropy?

A pile of library books is placed in a neat stack on a shelf.

A cyclist pedals harder while riding uphill.

A deserted field becomes overgrown with weeds.

A dining room is cleaned to remove dust.

The pictures show a grassy field that has been abandoned.

Energy is conserved as the lawn changes.

The lawn is a system that uses energy.

Work was done to change the lawn over time.

Over time, the lawn has naturally become disorderly.

Ethan made a diagram to compare examples of the first and second laws of thermodynamics.

X: The internal energy of a piston system increases as heat is added and rises to a cool areaY: As thermal energy is added to a container, some of the energy is lost to the environment

X: As thermal energy is added to a container, some of the energy is lost to the environmentY: The internal energy of a piston system increases as heat is added and rises to a cool area

X: A cold spoon placed in hot liquid gets warmer Y: Thermal energy is converted to light energy

X: Thermal energy is converted to light energy Y: A cold spoon placed in hot liquid gets warmer

What is the formula for calculating the efficiency of a heat engine?

Efficiency = StartFraction T Subscript h Baseline minus T Subscript C Baseline over T Subscript h Baseline EndFraction times 100.

Efficiency equals T Subscript c Baseline minus T Subscript h Baseline over T Subscript h Baseline all times 100.

Efficiency equals T Subscript h Baseline minus T Subscript c Baseline over T Subscript c Baseline all times 100.

Efficiency equals T Subscript c Baseline minus T Subscript h Baseline over T Subscript c Baseline all times 100.

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Second Law of Thermodynamics Answers

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