Aconical, flat-bottomed flask with a narrow neck that can be used for heating, mixing, watching reactions, and swirling, not for measuring

Erlenmeyer Flask

Explanation:

Erlenmeyer flask is also called as conical flask or titration flask. It is type of the laboratory flask that features flat bottom, conical body, and cylindrical neck.

Erlenmeyer flask is named after German chemist named Emil Erlenmeyer.

They have wide bases and with sides which taper upward to short vertical neck.

Mouth of Erlenmeyer flask may have beaded lip which can be covered or stopped. Büchner flask is a design modification of Erlenmeyer flask which used for the filtration under vacuum. Erlenmeyer flask is used for mixing , heating and swirling.

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.

a. energy is absorbed in the reaction.

if in a given reaction the energy of products is greater than the energy of reactants it means that reaction is endothermic and during the reaction, the energy is absorbed by reactants. in an endothermic reaction, the products have more stored chemical energy than the reactants. and in this reaction the reactants are more stable than products before the compounds with less energy are always more stable.