Question

If you begin with a sample of carbon dioxide at -60.0ºC and 0.50 atm and warm it to 30.0ºC and 0.50 atm, then there will be no phase transition in the sample.

True or False?

Answer 1

Consider a phase diagram of carbon dioxide and point out the provided temperature and pressures in the following graph as follows 10000 solid +liquid 1000 Co2 solid Super critical Co CO2 liquid 100 Sublimation point 1078.5°C at 1 atm uid +gas Critical point Triple poin -56.6°C at 5.11 atm 0.01 CO2 gas 0.001 140 -120 -100 -80 -60 40 20 0 20 40 60 80 100 Temperature (°C) Thus, both the temperature and pressure are in the same phase Therefore, the statement (there will be no phase transition in the sample) is true.