t (°C) P (mmHg) 80 100 120 140 0.0888 0.2729 0.7457 1.845 a) Calculate AHvap assuming it's constant in the whole temperature range. b) Calculate the vapour pressure at 160 ºC. c) Obtain the normal boiling temperature of mercury. d) The experimental value of the normal boiling temperature is 356.6 ºC. If there is any difference with the one you have calculated, could you give an explanation?

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