Solution Found!
For the following processes, is the work done by the
Chapter 19, Problem 1DQ(choose chapter or problem)
For the following processes, is the work done by the system (defined as the expanding or contracting gas) on the environment positive or negative? (a) expansion of the burned gasoline–air mixture in the cylinder of an automobile engine; (b) opening a bottle of champagne; (c) filling a scuba tank with compressed air; (d) partial crumpling of a sealed, empty water bottle as you drive from the mountains down to sea level.
Questions & Answers
QUESTION:
For the following processes, is the work done by the system (defined as the expanding or contracting gas) on the environment positive or negative? (a) expansion of the burned gasoline–air mixture in the cylinder of an automobile engine; (b) opening a bottle of champagne; (c) filling a scuba tank with compressed air; (d) partial crumpling of a sealed, empty water bottle as you drive from the mountains down to sea level.
ANSWER:Solution 1DQ We know that, when the work done by the system, it is positive and when the work done on the system, it is negative. (a) expansion of the burned gasoline–air mixture in the cylinder of an automobile engine: Here, the system will do the work, as the gas molecules will heat the engine which will increase pressure finally and make the piston move. So, the work is positiv