Question

Which of the following is false regarding phase diagrams ?

the critical point is the point above which liquids and gases lose their phase distinction

a phase diagram is a plot of temperature vs density

the triple point represents the conditions where solid/liquid/gas phases exist in equilibrium

solids exist at relatively high pressures and/or low temperatures

for most substances, the solid-liquid phase transition line has a positive slope

Answer 1

a phase diagram is used to differentiate betweem solid, liquid, and gas phase. these phase change into one another by changing temperature and pressure.

at high pressure and low temp. solid exits, at moderate pressure and temperature liquid exits and low pressure and high temperaturegas phase exits.

at triple point all phase exits at equilibrium.

so phase diagram must be plot between temperature and pressure to obtain information aboutdifferent phases.

so false option is second option. ( a phase diagram is a plot of temperature and density)