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Kelso High-Chem H-Enthalpy of Reactions

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Last updated about 5 years ago
11 questions
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Question 1
1.

Match the term with the best option

Draggable itemarrow_right_altCorresponding Item
A reaction that feels warm or hot
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exothermic reaction
A reaction that feels cold
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endothermic reaction
Amount of energy transferring in a reaction
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enthalpy of reaction
Heat unique to a substance
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specific heat
Question 2
2.

Fill in the blank: Chemical changes ____ involve the breaking and making of chemical bonds.

Question 3
3.

Fill in the blank: ________ is the measure of a quantity of energy.

Question 4
4.

1 kilocalorie is equal to

Question 5
5.

Which of the following is commonly used on food packages to measure the energy content?

If you can't watch the video here, go to the assignment and watch it there in the safe link.
Question 6
6.

A reaction that releases heat is

Question 7
7.

All elements have a ΔHf of ____ kj/mole at standard temperature and pressure

Question 8
8.

1 calorie is equal to ____ Joules.

Question 9
9.

Consider the phase change H2O(l) → H2O(g). This equation describes the phase change from liquid water to steam. Think about the heat flow that is necessary for this change to take place. What do you predict about the process?

Question 10
10.

Formation reactions that are exothermic have ΔHf values that are

Question 11
11.

We can also use the equation for enthalpy change for physical phase changes. Consider the phase change H2O(l) → H2O(g). Calculate ΔHrxn.
Use ΔHf values from the table above.
ΔHrxn =