AP Chemistry - Endothermic and Exothermic Reactions

1

If a reaction has a negative entropy and a negative enthalpy value, which of the following terms describes the energy of this reaction?

2

If the decomposition of 2 moles of gaseous into 1 mole each of gaseous and gaseous at $25^\circ C$ absorbs of heat energy, then what is the standard heat of formation of in kilojoules per mole?

3

$H_{2(g)} + I_{2(g)} \rightarrow 2HI_{2(g)}$ $\Delta H^{\circ} = -242\ \frac{\textup{kJ}}{\textup{mol}}$

The reaction shown is __________, and heat is __________ by the reaction.

4

The $\bigtriangleup H_{f }^{o}$ of individual products and reactants can be utilized to determine if the reaction is exothermic or endothermic.

Consider the following equation:

$CaCO_3_{(s)}\rightarrow CaO_{(s)} + CO_2_{(g)}$

Use a standard enthalpy of formation table to calculate the $\bigtriangleup H_{reaction }^{o}$ , and determine if the reaction is endothermic or exothermic.

5

If a reaction is endothermic and occurs spontaneously, which of the following is not true?

6

What type of energy conversion occurs during an endothermic reaction?

7

What will happen to the rate of an exothermic reaction if the temperature is increased?

8

Consider the following reversible, exothermic reaction:

$A + B \rightleftharpoons C + D$

The temperature of the vessel in which the reaction is taking place is increased from 300K to 350K. This leads the rate of the reverse reaction to __________.

Endothermic and Exothermic Reactions

Practice Questions