0
What effect does a catalyst have on the mechanism of a reaction? It usually binds to the reactant(s) and orients the reactants optimally to speed up the reaction. Remeber the lock and key model for enzymes? Or even how Heterogeneous catalysis work by holding onto the reactant to orient it correctly. Stop googling and start thinking.
NO. Catalysts only changes the Activation Energy of the reaction. They typically lower the activation energy of both the forward and the reverse reaction such that the Enthalpy of reaction (defined as the difference between Ea_forward and Ea_backwards) does not change.
No, a catalyst does not affect the enthalpy of a reaction. It lowers the activation energy required for the reaction to occur, but it does not change the overall energy balance of the reaction.
Add your answer:
Earn +20 pts
How does the presence of a catalyst affect the enthalpy change of a reaction?
A catalyst does not affect the enthalpy change of a reaction. It speeds up the reaction by providing an alternative pathway with a lower activation energy, allowing the reaction to proceed faster. The overall enthalpy change (ΔH) remains the same with or without a catalyst.
will a catalyst change the enthalpy of a reaction in a chemical reaction?
No, a catalyst will not change reaction enthalpy. If it does so, then it is NOT a catalyst but a reactant in stead!
What does a catalyst not do?
A catalyst does not change the equilibrium position of a reaction, meaning it does not alter the amount of products formed at equilibrium. Additionally, a catalyst does not affect the overall thermodynamics of a reaction, such as enthalpy or entropy. It also does not get consumed or chemically changed in the reaction it is catalyzing.
Do catalysts affect temperature?
A catalyst affects the speed of a chemical reaction. If the chemical reaction gives off heat, the reaction may affect the temperature, but the catalyst by itself doesn't affect the temperature.
Why does catalyst affect reaction speed?
The activation energy is reduced.
How does the presence of a catalyst affect the enthalpy change of a reaction?
A catalyst does not affect the enthalpy change of a reaction. It speeds up the reaction by providing an alternative pathway with a lower activation energy, allowing the reaction to proceed faster. The overall enthalpy change (ΔH) remains the same with or without a catalyst.
will a catalyst change the enthalpy of a reaction in a chemical reaction?
No, a catalyst will not change reaction enthalpy. If it does so, then it is NOT a catalyst but a reactant in stead!
What does a catalyst not do?
A catalyst does not change the equilibrium position of a reaction, meaning it does not alter the amount of products formed at equilibrium. Additionally, a catalyst does not affect the overall thermodynamics of a reaction, such as enthalpy or entropy. It also does not get consumed or chemically changed in the reaction it is catalyzing.
What is the value of the enthalpy change of the uncatalyzed reaction?
The enthalpy change of an uncatalyzed reaction is the heat energy absorbed or released during the reaction when no catalyst is present. This value can be determined by calculating the difference between the enthalpy of the products and the enthalpy of the reactants.
Do catalysts affect temperature?
A catalyst affects the speed of a chemical reaction. If the chemical reaction gives off heat, the reaction may affect the temperature, but the catalyst by itself doesn't affect the temperature.
How do catalyst and inhibtors affect reaction rate?
A catalyst speeds up the reaction and lowers the amount of heat needed.
Does a catalyst make a reaction exothermic?
No, a catalyst does not change the thermodynamics of a reaction, so it does not make a reaction exothermic. A catalyst provides an alternative pathway for the reaction to proceed at a faster rate, but it does not affect the overall energy change (enthalpy) of the reaction.
How does a catalyst affect the speed of a reaction?
A catalyst enables more particles to reach the activation energy and to take part in the reaction. Therefore the speed of the reaction increases.
Why does catalyst affect reaction speed?
The activation energy is reduced.
Does a catalyst affect a reaction activation energy?
yes. lowers it.
Assuming that the reaction is at equilibrium what effect does the addition of a catalyst have on the equilibruim?
a catalyst lowers the activation energy for both the forward and reverse reaction. however, it does not change the potential energy of the reactants or products. it also does not affect the heat of reaction (delta h)
What is the description of the enthalpy of reaction?
The enthalpy of a chemical reaction is the change of heat during this reaction.
