6. Chemical Reactions

Thermochemistry — Quiz

Test your understanding of thermochemistry with 5 practice questions.

Practice Questions

Question 1

What is the enthalpy change ($\Delta H$) when $100 \, \text{g}$ of water is cooled from $80^\circ C$ to $30^\circ C$? (Use $c = 4.18 \, \text{J/g}^\circ C$)

Question 2

A sample of $150 \, \text{g}$ of an unknown liquid absorbs $12,540 \, \text{J}$ of heat, and its temperature rises from $25^\circ C$ to $45^\circ C$. What is the specific heat capacity of the liquid?

Question 3

Which of the following best describes the relationship between bond formation and enthalpy change?

Question 4

A reaction has a $\Delta H$ of $+85 \, \text{kJ/mol}$. Which statement is true about the reaction?

Question 5

What is the final temperature if $200 \, \text{g}$ of water absorbs $10,450 \, \text{J}$ of heat, starting from $25^\circ C$? (Use $c = 4.18 \, \text{J/g}^\circ C$)