Laws of Thermodynamics Practice Test

A student conducts an experiment for a chemistry class. The student wishes to explore power generation from different types of voltaic cells. He sets up three different cells, and then compares the amount of energy generated from each one.

One of his cells is shown below as an example. Both remaining cells follow the same layout.

A scientist discovers that a voltaic cell he constructs is able to run and produce energy indefinitely, without ever needing intervention again. Which law is this cell violating?

A researcher measures the kinetic energy of a chair sliding on a rough floor. At the beginning of motion the chair has a kinetic energy of . Once the chair stops sliding the kinetic energy is . What can you conclude about the researcher’s results?