Which of the following principles is the closest interpretation of the first law of thermodynamics?

In order to investigate Boyle's law, the Polytropic process done in the experiment is: Select one: a. Expansion of oil. b. Isometric expansion of air. c. Isothermal expansion of oil. d. Isothermal expansion of air.

The arrangement of heat engines used to develop the thermodynamic temperature scale.

Krypton in a closed system is compressed adiabatically from 74 K and 1 bar to a final pressure of 24 bar. What is the final temperature in K? Assume krypton is an ideal gas. From Appendix B in the text, we can assume the heat capacity of krypton is independent of temperature and CP=2.5R , where R is the molar gas constant R=8.314 J/(mol K). For an ideal gas, recall CV=CP−R=1.5R. Report your answer in units of K using three decimal places.