Page 2of 191.Refer to Figure 1 below.
What is represented by the line between points F and G on the phase diagram?
A)the boiling point of the substance as it varies with pressure
B)the melting point of the substance as it varies with pressure
C)the formation of an a zeotropic mixture
D)the formation of a eutectic mixture
E)the critical point as it varies with pressure temperature Figure 1. A temperature-pressure phase diagram for a single substance.
2.The Root Mean Squared (RMS) Speed (or velocity) of nitrogen molecules at 20ºC is which ONE of the following?[The Gas Constant is 8.314 J K-1mol-1and the relative molecular mass of nitrogen is 28.02.]A)4ms-1B)16ms-1C) 133ms-1D) 511ms-1E) 536ms-1GliquidsolidgasF
Page 3of 193.The inter molecular forces between molecules in a gas are…A)Repulsive at long distances and attractive at very short distances
B)Attractive at long distances and repulsive at very short distances
C)Attractive at all distances
D)Repulsive at all distances
E)Non-existent ingases
4. Water has an anomalously high boiling point due toits…
A)low molecular mass
B)high refractive index
C)high bond polarity
D)high heat capacity
E)low vapourpressure5.A phase boundary of a substance indicates…
A)a point at which the substance changes from one phase to another
B)the normal melting point or normal boiling point of the substance
C)the most stable phase of the substanceD)the most unstable phase of the substance
E)a dynamic equilibrium between any two phases of thesubstance6.The failure of the ideal gas law is most pronounced under whichconditions?A)at moderate temperature andpressureB)at moderate temperature and lowpressureC)at low temperature and moderate pressure
D)at low temperature and high pressure
E)at high temperature and lowpressure
7.A sealed bulb full of carbon dioxide gas has how many degrees of freedom?
