Two volatile liquids "A" and "B" form a solution whose mole fraction vs. vapor pressure sketch (at 25 ◦ C ) is show below. An equimolar mixture of liquids A and B are placed in a closed container (at 25 ◦ C ). At equilibrium, the vapor above the mixture will be

altitude, density, pressure

air gets less dense the higher the altitude and also the air pressure is less as altitude rises.

the ratio of the conjugate base to the acid required to attain the desired ph.

the enthalpy of formation of water is given as -285.8kj/mol, which states that the enthalpy of formation is negative.

negative enthalpy of formation indicates that the heat is released during the reaction process. the heat is released from reaction to the surroundings the enthalpy is expressed with a negative sign with the energy given out in the reaction process.

the formation of water takes place by giving out heat which is -285.8 kj/mol.