Which of the statements is correct regarding catalysts ( click 4 that apply )

Catalyst increase the rate of reaction

Catalyst decrease the rate of reaction

Catalyst increase the activation energy needed to start a reaction

Catalyst decrease the activation energy needed to start a reaction

They are used up in the reaction

They are not used up in the reaction

Catalyst are very specific

Catalyst are not very specific

Catalyst increase the rate of reaction

Catalyst decrease the activation energy needed to start a reaction

They are not used up in the reaction

Catalyst are not very specific

Explanation:

From the basic chemistry it is known Catalysts are substance that accelerates the rate of reaction without altering the nature of reaction.

Catalysts decreases the energy required for activation, in order to make collisions quicker.

Then, Catalyst just alters the rate of reaction alone and doesn't takes part in the chemical reaction.

Some catalysts are specific. But in general most of the catalysts are not specific in nature.

answer: the value of enthalpy change will be -152.80 kj.

solution:

pressure = 1atm , temperature = = 298 k

given that pressure and temperature are same in both gases , the number of moles of both gases can be determined by the ideal gas equation.

according to reaction 3 moles no are reacting with 1 mol of ,then 0.49 mol of no will react with moles of ozone that is 0.16 moles of ozone. since, no is limiting reagent and is an excessive reagent.

enthalpy change for the reaction between the given volumes of the gases is :

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