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3 years ago

Is gasoline evaporated a chemical change

Chemistry

2 answers:

Len [333]3 years ago

5 0

No. The only thing that changed was the looks of the gasoline, not the chemical components.

boyakko [2]3 years ago

5 0

Answer:

The correct answer is No

Explanation:

A chemical change is often characterized by the following

new substance is formed
not easily reversible
in most cases, process are represented by a chemical equation

The evaporation of gasoline does not meet any of the characteristics above. When, a gasoline evaporates, it is converted from it's liquid form to it's gaseous form hence no new substance is formed, and if this conversion is done in a controlled environment, the gaseous form can be easily reversed back to it's liquid form by cooling. There is no chemical equation needed for this process since no new substance is formed.

Because of the reasons provided earlier, evaporation of gasoline is a physical change and not a chemical change.

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blagie [28]

Answer: For the elementary reaction $NO_3+CO\rightarrow NO_2+CO_2$ the molecularity of the reaction is 2, and the rate law is rate = $k[NO_3]^1[CO]^1$

Explanation:

Order of the reaction is defined as the sum of the concentration of terms on which the rate of the reaction actually depends. It is the sum of the exponents of the molar concentration in the rate law expression.

Elementary reactions are defined as the reactions for which the order of the reaction is same as its molecularity and order with respect to each reactant is equal to its stoichiometric coefficient as represented in the balanced chemical reaction.

Molecularity of the reaction is defined as the number of atoms, ions or molecules that must colloid with one another simultaneously so as to result into a chemical reaction. Thus it can never be fractional.

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