What purpose is served by washing the ethereal extract (ether layer) containing the product with saturated sodium bisulfite

Does the energy in a solid increase or decrease when changing to a liquid?

How many liters of water vapor can be produced if 108 grams of methane gas (ch4) are combusted at 312 k and 0.98 atm? show all work. pls ! will mark as brainliest

8.98 dm3 of hydrogen gas is collected at 38.8 °c. find the volume the gas will occupy at -39.9 °c if the pressure remains constant.