Agas in its ideal-gas state undergoes the following sequence of mechanically reversible processes in a closed system:
a) from an initial state of 70c and 1 bar, it is compressed adiabatically to 150c
b) it is then cooled from 150 to 70c at constant pressure
c) finally, it expands isothermally to its original state
calculate w, q, deltau, deltah, for each process and for the entire cycle. take cv = 12.471 and cp= 20.785 j/mol*k

Why is permeable soil best for plants that need a lot of drainage?

Earth's axis of rotation is tilted at an angle of 23.5 degrees. what is one change you would see on earth if its axis was not tilted?

16. why must the number of electrons lost equal the number of electrons gained in every redox reaction? use 3 – 4 sentences in your own words to address this question. 18. what type of radiation is emitted when chromium-51 decays into manganese-51? show the nuclear equation that leads you to this answer. 19. a radioactive nucleus alpha decays to yield a sodium-24 nucleus in 14.8 hours. what was the identity of the original nucleus? show the nuclear equation that leads you to this answer.