When a substance undergoes an isobaric expansion at a pressure higher than its c

Question

When a substance undergoes an isobaric expansion at a pressure higher than its critical pressure it may undergo a phase change. a. TRUE/FALSE Within the liquid-vapor dome a state can be fixed by either specific volume or pressure or temperature. a. TRUE/FALSE Liquid water, solid ice, and water vapor can coexist in a stable equilibrium occurring at exactly 273.16 K (0.01 degree C; 32.02 degree F) and a partial vapor pressure of 611.657 pascals (6.11657 mbar; 0.00603659 atm) a. TRUE/FALSE States to the left of the temperature dome are called superheated vapors and states to the right are called subcooled liquid states. a. TRUE/FALSE A quality value of zero is at its saturated vapor state. a. TRUE/FALSE Liquid states can be obtained using saturated liquid data. The compressed liquid tables (a-5) show minimal changes at the same temperature and various pressures. Thus v(T, p) almostequalto v_f, u(T, p) almostequalto u_f and h(T, p) almostequalto h_f a. TRUE/FALSE The unitless compressibility factor approaching one is not valid for Ideal Gases. a. TRUE/FALSE

Explanation / Answer

Isobaric expansion is a thermodynamic process which occurs at constant pressure. If this pressure is higher than the critical pressure Pc then we cannot differentiate the liquid and vapour phases. So if we heat the mixture then it does not appear as transfoprmation from liquid to vapour and vice versa. No solid phase is involved here.

So the given statement is false.

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