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Reaction and Bond Enthalpy

Authored by Shelley Kozlowski

Chemistry

12th Grade

NGSS covered

Used 13+ times

Reaction and Bond Enthalpy
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8 questions

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1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

When new chemical bonds form, energy ____________.

is taken into the system.

is released from the system.

stays the same in the system.

Tags

NGSS.HS-PS1-4

2.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Does breaking bonds require energy, release energy, or not involve energy at all?

requires energy to break

releases energy when broken

No energy involved

Tags

NGSS.HS-PS1-4

3.

OPEN ENDED QUESTION

30 sec • 1 pt

Media Image

Use bond energies to determine the energy change for the following reaction and use the information to determine if it is an endothermic or exothermic reaction:


HCN + H2 --> CH3N2

Evaluate responses using AI:

OFF

Tags

NGSS.HS-PS1-4

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Bond enthalpy is __________.

always negative

always positive

sometimes positive and sometimes negative

always zero

unpredictable

Tags

NGSS.HS-PS1-4

5.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

As the number of covalent bonds between two atoms increases, the distance between the atoms ______ and the strength of the bond between them ______.

increases, increases

decreases, decreases

increases, decreases

decreases, increases

is unpredictable

6.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

The ion NO- has _____ valence electrons.

10

12

14

15

16

Tags

NGSS.HS-PS1-1

7.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Is this equation endo- or exo-thermic?

2KNO3 (s) + energy --> 2KNO2 (s) + O2

endothermic

exothermic

Tags

NGSS.HS-PS1-4

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