1 (5 points) When using the first law of thermodynamics it is important to know when work, W, is positive or negative. Match the sign to each situation. Question 1 options: work done on the system work done by the system work done by the surrounding environment work done on the surrounding environment 1. positive 2. negative Question 2 (5 points) When using the first law of thermodynamics it is important to know when heat, Q, is positive or negative. Match the sign to each situation. Question 2 options: heat removed from the system heat added to the system heat added to the surrounding environment heat removed from the surrounding environment 1. positive 2. negative Question 3 (5 points) Select all of the statements below that are correct. Question 3 options: A Carnot engine operating between two given temperatures has the greatest possible efficiency of any heat engine operating between these two temperatures. Heat transfer occurs spontaneously from higher-temperature bodies to lower-temperature bodies but never spontaneously in the reverse direction. It is impossible for any process to have as its sole result heat transfer from a cooler to a hotter object. It is impossible in any system for heat