Two moles of gas a spontaneously convert to three moles of gas b in a container where the temperature and pressure are held constant. the sample originally took up 10.2 l of volume. what is the new volume of the products

2A >3B

from equation 2 mol 3 mol

Volumes of the gases under the same conditions are proportional to the numbers of the moles of these gases.

n(A) : n(B) = V(A) : V(B)

V(B) = n(B)*V(A)/n(A) = 3*10.2/2 = 15.3 L

V(B)=15.3 L

definition

                    entropy is a measure of the randomness or the extent of disorder of a chemical process.

                      enthalpy is a measure of the heat change of a reaction occurring at a constant pressure.

measurement units:

                        entropy is measured in joule per kelvin (jk⁻¹)   whereas enthalpy is measured in joule per mole (jmol⁻¹)

requirements:

                            entropy has no requirements or limits, and its change is measured by the division between the heat change of the chemical process and the temperature.

                              in contrast, enthalpy can only be related to the heat change of the reaction under standard conditions.