**QUIZ 7 – Chapter 5 Part 1** **Total time: 10 minutes**
### Part I. (8 points) Multiple choice questions **Question 1:** Is the energy released or consumed in the following process? ![Quiz-7-Q1.png](./images/Quiz-7-Q1.png) * **A.** Released * **B.** Consumed * **C.** A and B * **D.** Neither A nor B **Question 2:** The following diagrams represent three systems in thermodynamics. What are they from left to right? ![Quiz-7-Q2.png](./images/Quiz-7-Q2.png) * **A.** Isolated, open, closed * **B.** Closed, open, isolated * **C.** Open, isolated, closed * **D.** Isolated, closed, open **Question 3:** A reaction under certain conditions has an enthalpy change of $\Delta H = -118 \text{ kJ}$. This means that $118 \text{ kJ}$ of heat would be liberated * **A.** if the reaction were carried out at constant pressure. * **B.** if the reaction were carried out at constant concentrations. * **C.** no matter how the reaction were carried out. * **D.** if the reaction were carried out at constant volume. **Question 4:** A gas at $25.00^\circ\text{C}$ and $0.47 \text{ atm}$ expands from $25.0 \text{ L}$ to $35.0 \text{ L}$. What is the value of the work done on or by the gas? ($1 \text{ L}\cdot\text{atm} = 101.325 \text{ J}$) * **A.** $480 \text{ J}$ * **B.** $3600 \text{ J}$ * **C.** $-3600 \text{ J}$ * **D.** $-480 \text{ J}$ ### Part II. (2 points) Long answer question **Question 5:** When fuel is burned in a cylinder equipped with a piston, the volume expands from $0.255 \text{ L}$ to $1.45 \text{ L}$ against an external pressure of $1.02 \text{ atm}$. In addition, $875 \text{ J}$ is emitted as heat. What is the $\Delta E$? ($101.3 \text{ J} = 1 \text{ L}\cdot\text{atm}$)