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Kelso High-Chem H-Enthalpy of Reactions

Last updated almost 5 years ago

11 questions

1

Match the term with the best option

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

1

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

1

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

1

1 kilocalorie is equal to

1

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.

1

A reaction that releases heat is

1

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

1

1 calorie is equal to ____ Joules.

1

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?

1

Formation reactions that are exothermic have ΔHf values that are

1

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 =