The vapor pressure of liquid ethanol, c2h5oh, is 100. mm hg at 308 k.

a sample of c2h5oh is placed in a closed, evacuated 529 ml container at a temperature of 308 k. it is found that all of the c2h5oh is in the vapor phase and that the pressure is 67.0 mm hg. if the volume of the container is reduced to 344 ml at constant temperature, which of the following statements are correct?

choose all that apply.

the pressure in the container will be 103 mm hg.

some of the vapor initially present will condense.

liquid ethanol will be present.

only ethanol vapor will be present.

no condensation will occur.

answer : one can design an experiment using a liquid and an additive that can be added to the liquid and observe the chemical changes in the reaction species.

one would need a beaker which is filled with a known amount of the liquid in which thermometer is placed to measure the temperature changes; after addition of the additive to the liquid solution one can note down the temperature change and find whether the reaction is endothermic or exothermic in nature. by subtracting the initial temperature value with the final temperature one can find the temperature changes.

various combinations of liquid and additive can be used. liquid in this case can be a known quantity of water and additives can be epsom salt or without epsom salt the experiment can be conducted to notice the changes. water and ice, hydrogen peroxide and dry yeast, vinegar and baking soda,etc.

it should have an internal chamber and two thermometers sticking out of the top. the internal chamber will also be closed off from the outside.

there are two significant figures.