Question

1.The triple point of sulfur dioxide is 197.64 K and 0.0165 atm. The critical point is 430.7 K and 77.8 atm. Its vapor pressure at room temperature is 2.34 atm. At room temperature and standard pressure, what phase is sulfur dioxide? Solid Liquid Gas Supercritical fluid

2.Using the information from question 4, what state would the sulfur dioxide be in at 180 K and 0.100 atm? Solid Liquid Gas Illinois

3.Using the information from question 4, what will happen to sulfur dioxide gas at room temperature if the pressure is increased while the temperature held constant? It will become a supercritical fluid. It will remain a gas. It will turn into a solid. It will become a liquid.

Answer 1

Ans 1- As shown in the triple point phase diagram of sulfur dioxide above at room temperature 25°C and 1 atm, the phase of sulfur dioxide is gas.

Ans2- At 180K (=-93. 15°C) and 0.100 atm, it remains in solid phase.

Ans 3- if pressure increases at constant temperature (25°C), initially it remains in a gas phase, after increasing it will become liquid.