Chemistry, 04.11.2019 03:31 nicpinela1234

In an experiment, a student wants to increase the rate of a reaction that involves gases. which change to the reactants would
accomplish this?
increase the volume to decrease pressure and to increase concentration.
increase the volume to increase pressure and to decrease concentration.
o decrease the volume to decrease pressure and to increase concentration.
o decrease the volume to increase pressure and to increase concentration.

Answers: 2

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Answer from: sherry59Sherry59

The last option: Decrease the volume to increase pressure and to increase concentration.

Explanation:

You can support your choice on basis of the collision theory.

According to the collision theory, the chemical reactions happen when the molecules collide with each other, in the correct orientation and with enough kinetic energy to overcome the activation energy.

As consequence, the larger the number of collisions the larger the rate of a reaction.

In the case of a reaction that involves gases, decreasing the volume, will increase the pressure and the concentration (volume is inversely related to both the pressure and the concentration) causing the molecules to be closer to each other and to collide with higher frequency, this is you will expect more collisions, and so an increase on the rate of the reaction. That is expressed by the last choice: decrease the volumen to increase pressure and to increase concentration.

Answer from: Quest

Evaporation: this is when warmth from the sun causes water from oceans, lakes, streams, ice and soils to rise into the air and turn into water vapour (gas). water vapour droplets join together to make clouds! condensation: this is when water vapour in the air cools down and turns back into liquid water.

Answer from: Quest

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.

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In an experiment, a student wants to increase the rate of a reaction that involves gases. which chan...

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