Stoichiometry
'Cox' chart which is useful in the design of a distillation column (particularly suitable for petroleum hydrocarbons) is a plot of the

Vapor pressure vs. log (temperature)
Temperature vs. log (vapor pressure)
Log (temperature) vs. log (vapor pressure)
Vapor pressure vs. temperature

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Stoichiometry
At 100°C, water and methylcyclohexane both have vapour pressures of 1 atm. Also at 100°C, the latent heats of vaporisation of these compounds are 40.63 kJ/mole for water and 31.55 kJ/mole for methylcyclohexane. The vapour pressure of water at 150°C is 4.69 atm. At 150°C, the vapour pressure of methylcyclohexane would be expected to be

Significantly more than 4.69 atm
Indeterminate due to lack of data
Nearly equal to 4.69 atm
Significantly less than 4.69 atm

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Stoichiometry
A perfectly insulated container of volume V is divided into two equal halves by a partition. One side is under vacuum, while the other side has one mole of an ideal gas (with constant heat capacity) at 298 K. If the partition is broken, the final temperature of the gas in the container

Will be 298 K
Will be greater than 298 K
Will be less than 298 K
Can not be determined

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