What is activation energy in catalyst?

Activation Energy – energy needed to start a reaction between two or more elements or compounds. Catalyst– A molecule that increases the rate of reaction and not consumed in the reaction.

What is the activation energy on a graph?

In a diagram, activation energy is graphed as the height of an energy barrier between two minimum points of potential energy. The minimum points are the energies of the stable reactants and products. Even exothermic reactions, such as burning a candle, require energy input.

Is gas to plasma endothermic or exothermic?

Thus any transition from a more ordered to a less ordered state (solid to liquid, liquid to gas, or solid to gas) requires an input of energy; it is endothermic. Conversely, any transition from a less ordered to a more ordered state (liquid to solid, gas to liquid, or gas to solid) releases energy; it is exothermic.

What is activation energy?

activation energy, in chemistry, the minimum amount of energy that is required to activate atoms or molecules to a condition in which they can undergo chemical transformation or physical transport.

What does activation energy depend on?

In other words, at a given temperature, the activation energy depends on the nature of the chemical transformation that takes place, but not on the relative energy state of the reactants and products.

What is the relation of activation energy and catalyst?

Fortunately, it’s possible to lower the activation energy of a reaction, and to thereby increase reaction rate. The process of speeding up a reaction by reducing its activation energy is known as catalysis, and the factor that’s added to lower the activation energy is called a catalyst.

What is meant by activation energy?

How do you find the activation energy from an Arrhenius plot?

Determining Activation Energy. Notice that when the Arrhenius equation is rearranged as above it is a linear equation with the form y = mx + b; y is ln(k), x is 1/T, and m is -Ea/R. The activation energy for the reaction can be determined by finding the slope of the line.

What are the 4 phase changes?

Lesson Summary Freezing: liquid to solid. Melting: solid to liquid. Condensation: gas to liquid. Vaporization: liquid to gas.

Which phase change is below endothermic?

Hence, fusion, vaporization, and sublimation are all endothermic phase transitions.