Answer Happy

Inside a thermally insulated container we place 3 mol of a solid initially at a temperature of -100°C and 2 mol of a diatomic gas initially at a temperature of 200°C. a) If the vibrational modes of the diatomic gas are frozen, what is the final temperature of the system? b) Without doing any calculations, do you think the final temperature would be higher or lower if the vibrational modes were active? Explain your answer. c) Now calculate the final temperature if the vibrational modes are active. d) Suppose instead of a diatomic gas we used 2 mol of a gas whose molecules contain an unknown number of atoms, but the initial temperature is still 200°C. If the final temperature of the system 77.3°C how many active modes does the gas have? Assuming all modes of this gas are active, what type of molecule do you think this is?