BO, U. MHBO, pK 2.43 e) re water M HA, pka 4.55 Use the phase diagram to answer

Question

BO, U. MHBO, pK 2.43 e) re water M HA, pka 4.55 Use the phase diagram to answer the next two questions. 3. According to the phase diagram above, the melting point of the solid a) must decrease with increasing pressure. b) is equal to -20°C regardless of pressure. c) is equal to 200°C regardless of pressure. d) is lower than the freezing point of the liquid. (et must increase with increasing pressure. 4. According to the phase diagram above, if the solid is continuously heated at 1.0 atm, it will a) melt below -20°C. b) sublime at -20°C. c) melt at -20°C. d) sublime below -20oc. e vaporize at the triple point.

Explanation / Answer

1)

(a) must decreases with increasing pressure

as melting point is the phase change from solid to liquid so for which the line is inclined towards left there by showing that the freezing point decreases with increasing pressure

2)

(d)sublime below -20 C

because at 1 atm there is phase line between solid and gas at temperature less than -20 C

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