If we are told both the temperature and pressure for a system containing a pure
ID: 1859784 • Letter: I
Question
If we are told both the temperature and pressure for a system containing a pure substance, according to the Gibbs Phase Rule we should expect our system is:
A) Three phases in equilibrium B) Two phases in equilibrium
C) One phase in equilibrium
D) Either one phase in equilibrium or a saturated mixture (if the given pressure is the saturation pressure for the given temperature)
E) Either one phase in equilibrium, a saturated mixture (if the given pressure is the saturation pressure for the given temperature), or three phases in equilibrium (if the given (T, P) pair corresponds to the triple point)
Explanation / Answer
E) Either one phase in equilibrium, a saturated mixture (if the given pressure is the saturation pressure for the given temperature), or three phases in equilibrium (if the given (T, P) pair corresponds to the triple point)