Which of these describes the rate of this chemical reaction? h2 + cl2 → 2 hcl a. an increase in the concentration of hcl and h2 with time b. an increase in the concentration of hcl with time c. an increase in h2 and cl2 with time d. a decrease in hcl and cl2 with time

b.an increase in concentration of HCl with time.

Explanation:

The measurement of reaction rate is simply based on the dissapearance of a reactant or appearance of a product with increasing reaction time.

For this kind of chemical reaction, the rate would increase if the concentration of the reactants increase.

The reactants are made up of gaseous particles, for gases reacting, the rate of the reaction is directly proportional to concentration. The concentration of a gaseous system is also directly proportional to the pressure and we can use pressure in place of concentration.

For this reaction, we don't know the order of reaction of the reactants. This would not make the gaseous reactants suitable to monitor the rate of the reaction.

Since it is only the appearance of the product we are sure of, we simply monitor the concentration of the product to determine the rate.

geosphere and hydrosphere.

this is because the geosphere has to do with geological events, while the hydrosphere controls all water on earth.

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.