Second Law of Thermodynamics

Question 1

The chart shows data for four heat engines.Which lists the engines from most efficient to least efficient?

Revolt · Accepted Answer

Z, X, W, Y

Question 2

Which statement describes the relationship between energy and entropy in the universe?

Revolt · Accepted Answer

Energy must be added to decrease entropy.

Question 3

The diagram shows a heat engine.

Revolt · Accepted Answer

Z

Question 4

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

Revolt · Accepted Answer

It occurs naturally.

Question 5

Which best describes the first law of thermodynamics as compared to the second law of thermodynamics?

Revolt · Accepted Answer

The first law describes how thermal energy is conserved but not the direction it moves.

Question 6

The pictures show a grassy field that has been abandoned.

Revolt · Accepted Answer

Over time, the lawn has naturally become disorderly.

Question 7

A heat engine uses thermal energy flowing from a heat source that is 225 K to a cold sink that is 50 K.

Revolt · Accepted Answer

78%

Question 8

Which is the best example of increasing entropy?

Revolt · Accepted Answer

A deserted field becomes overgrown with weeds.

Question 9

Rosa pours a cup of boiling water into a pot of room-temperature water. According to the second law of thermodynamics, what will occur?

Revolt · Accepted Answer

Thermal energy from the boiling water will flow to the room-temperature water until all of the water in the pot is at a single temperature.

Question 10

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.

Revolt · Accepted Answer

Thermal energy moves from warmer objects to cooler objects.

Second Law of Thermodynamics Answers

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