An increase in temperature affects the reaction rate by decreasing the velocities of particles that collide in the reaction. increasing the number of molecules that have sufficient kinetic energy to react. increasing the number of molecules that have sufficient potential energy to react. decreasing the energy that particles need to overcome the energy activation barrier.

An increase in temperature affects the reaction rate by .

Further Explanation:

The speed with which a chemical reaction proceeds is known as the rate of reaction. It is expressed either in terms of consumption of reactants or in the production of products per unit time.

Consider a general chemical reaction as follows:

Here,

A and B are the reactants.

C and D are the products.

x and y are the stoichiometric coefficients of reactants.

p and q are the stoichiometric coefficients of products.

The rate for the above reaction can be expressed in terms of reactant concentration as follows:

Or it can also be expressed in terms of product concentration as follows:

The negative sign indicates that the reactants are being consumed in the reaction and their concentration is decreasing. The positive sign refers to the formation of products whose concentration increases during the reaction.

Temperature is a key factor that affects the rate of chemical reactions. Kinetic energy is directly proportional to the temperature of the substance. If the temperature of the substance is high, its particles move faster and their collision with each other occurs to a greater extent. Therefore if the temperature is increased in any chemical reaction, the number of particles with the sufficient kinetic energy required for the reaction increases and thereby increasing the reaction rates.

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Answer Details:

Grade: Senior School

Chapter: Chemical Kinetics

Subject: Chemistry

Keywords: reactants, products, rate of reaction, x, y, A, B, C, D, temperature, kinetic energy, collision, particles, negative sign, positive sign.

Option (b) is the correct answer.

Explanation:

An increase in temperature results in more collisions between the particles. As a result, the particles which earlier had only potential energy will now gain more energy because of temperature increase.

Thus, this gain of energy is the kinetic energy and this will also increase the number of molecules sufficient to participate in the reaction.

Hence, we can conclude that an increase in temperature affects the reaction rate by increasing the number of molecules that have sufficient kinetic energy to react.

while cooking a piece of 1/2 pound beef steak, a cast iron pan (2.4kg in weight) was heated 260 celsius.

c-14 is carbon-14, or radiocarbon.   it is a radioactive isotope of carbon with an atomic nucleus containing 6 protons and 8 neutrons.