spontaneous reactions

spontaneous reactions

11th - 12th Grade

28 Qs

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spontaneous reactions

spontaneous reactions

Assessment

Quiz

Chemistry

11th - 12th Grade

Medium

NGSS
HS-PS1-4, HS-PS1-5, HS-PS3-1

+2

Standards-aligned

Created by

Kimberly Brumley

Used 51+ times

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28 questions

Show all answers

1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What does Gibbs Free Energy tell us?

How much energy is given off by a reaction.

The tendency of a reaction to become "random"

How spontaneous a reaction is.

Tags

NGSS.HS-PS1-4

NGSS.HS-PS3-1

2.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What information do we need to perform a calculation of Gibbs Free Energy?

Enthalpy of the reaction.

Entropy of the reaction.

The temperature of the reaction in Kelvin.

All of the above are needed.

Tags

NGSS.HS-PS3-1

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Spontaneous reactions may be extremely slow.
True
False

Tags

NGSS.HS-PS1-5

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which of the following would most likely lead to a spontaneous reaction.

A high negative enthalpy.

A low negative enthalpy.

A high positive enthalpy.

A low positive enthalpy.

Tags

NGSS.HS-PS1-4

5.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

A reaction has a positive ΔH and a positive ΔS. Which of the following is true?
It will be spontaneous at all temperatures.
It will be nonspontaneous at all temperatures.
It will be spontaneous at low temperatures.
It will be spontaneous at high temperatures.

6.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Your enthalpy is high and negative but your entropy is also negative. What type of temperature would you want to get a spontaneous reaction?

low

high

Tags

NGSS.HS-PS1-5

7.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Your enthalpy is positive and your entropy is positive. What type of temperature would you want to ensure a spontaneous reaction.

very high

very low

Tags

NGSS.HS-PS1-5

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