chem help!!?

Question

Which of the following are true statements about CO2 ?
a) The melting point of CO2 increases as pressure increases
b) The critical point of CO2 occurs at −57oC and 5 atm
c) At −20oC and 10 atm CO2 is in the gas state
d) At 20oC and 1 atm, solid CO2 will sublime
e) Above 31oC a pressure greater than 73 atm would condense CO2 to the liquid state

Answer 1

a and e