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Cfe Chem

Authored by Charles Martinez

Chemistry

12th Grade

NGSS covered

Cfe Chem
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88 questions

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1.

MULTIPLE CHOICE QUESTION

15 mins • 1 pt

Use the information in your databook to calculate the enthalpy change for the following reaction:

H2(g) + Cl2(g) --> 2HCl(g)

172

200

-185

450

Tags

enthalpy

2.

MULTIPLE CHOICE QUESTION

15 mins • 1 pt

1. Chloromethane can be produced by the reaction of methane with chlorine.


CH4(g) + Cl2(g) --> CH3Cl(g) + HCl(g)

Using bond enthalpies from the data booklet, calculate the enthalpy change, in kJmol−1, for this reaction

26

-234

15

-115

Tags

enthalpy

3.

MULTIPLE CHOICE QUESTION

15 mins • 1 pt

1. 0.22g of propane (C3H8) was used to heat 200cm3 of water. The temperature of water was raised by 35oC. Calculate the enthalpy of combustion of propane.

-5852

-3218

2297

3456

Tags

enthalpy

4.

MULTIPLE CHOICE QUESTION

15 mins • 1 pt

The enthalpy of combustion can be described as

When 1 mole of solute dissolves in water

When 1 mole of substance is fully combusted in oxygen

1 one mole of water is produced in a neutralisation reaction

5.

MULTIPLE CHOICE QUESTION

15 mins • 1 pt

6.9 g of ethanol (C2H5OH) was burned and the heat produced was used to raise the temperature of one litre of water by 49oC. Assuming all the heat released by the burning ethanol was absorbed by the water; calculate the enthalpy of combustion of ethanol.

204

1365

-1365

-768

Tags

NGSS.HS-PS1-4

NGSS.HS-PS3-4

6.

MULTIPLE CHOICE QUESTION

15 mins • 1 pt

1. The enthalpy of combustion of methanol (CH3OH) is -715kJ mol-1. What mass of methanol would be burned to produce 71.5kJ of energy?

6.4

32

3.2

7.15

Tags

NGSS.HS-PS1-4

NGSS.HS-PS3-1

7.

MULTIPLE CHOICE QUESTION

15 mins • 1 pt

Media Image

Use Hess's Law to calculate the enthalpy of combustion of methane

- 891 KJ mol-1

- 605 KJ mol-1

- 1041 KJ mol-1

- 1435 KJ mol-1

Tags

NGSS.HS-PS1-4

NGSS.HS-PS3-1

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