Water in the bottom of a narrow, metal tube is held at a constant temperature of 293 K. The total pressure of air (dry) is 1.01325 x 105 Pa, and is also at 293 K. The water evaporates and diffuses through the air in the tube, where the diffusion path is 0.1524 m long. Calculate the rate of steady-state evaporation if the diffusivity of water vapor in air at 293 K and 1 atm is 0.250 x 10-4 m2/s. Assume a gas constant value of 8314 K/m2.s2

answer: they produce more slow than unicellular organisms.

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.