Question 15 5 pts When a gas undergoes expansion, work is being done Select) the system and mathematically that work has a Select On the phase diagram shown below, the phase present in region a is [Select) the phase present in region bis Select] and the phase present in region cis (Select] Phase Diagram for Water 217.75 (Critical pressure) Critical Point E D b Pressure in atm a Normal freezing point B 1.00 Normal boiling point 0.0060 Triple point 0.00 0.01 100.00 373.99 Phase Diagram for Water 217.75 (Critical pressure) Critical Point E D b Pressure in atm a Normal freezing point 1.00 Normal boiling point B 0.0060 Triple point 0.00 0.01 373.99 100.00 Temperature in C