100 kg of r-134a at 200 kpa are contained in a piston–cylinder device whose volume is 13.206 m3. the piston is now moved until the volume is one-half its original size. this is done such that the pressure of the r-134a does not change. determine the final temperature and the change in the total internal energy of r-134a. use data from the steam tables.

Global warming will produce rising sea levels partly due to melting ice caps but also due to the expansion of water as average ocean temperatures rise. to get some idea of the size of this effect, calculate the change in length (in m) of a column of water 1.45 km high for a temperature increase of 1.12°c. assume the column is not free to expand sideways. as a model of the ocean, that is a reasonable approximation, as only parts of the ocean very close to