Ethane is heated at constant pressure started from 10 Mpa and 100 C until the volume increases to 60%. Determine the final temperature using:(a) the ideal-gas equation of state and (b) the compressibility factor. Which of these two results is the more accurate?

Neptune is the eighth planet from the sun. it was the first planet to get its existence predicted by  mathematical calculations  before it was actually seen through a telescope on sept. 23, 1846. irregularities in the orbit of  uranus  led french astronomer alexis bouvard to suggest that the gravitational pull from another celestial body might be responsible. german astronomer johann galle then relied on subsequent calculations to   spot neptune via telescope. previously, astronomer galileo galilei sketched the planet, but he mistook it for a star due to its slow motion. in accordance with all the other planets seen in the sky, this new world was given a name from greek and roman mythology — neptune, the roman god of the sea.

Are there options for this?

Ithink it is letter b, i may be wrong but i think that is the answer