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When is a reaction said to be endothermic?
A reaction is said to be endothermic when it absorbs heat from its surroundings, which means that heat is a reactant in the reaction. This results in a decrease in the temperature of the surroundings.
What would happen to a system at equilibrium of more of one compound in a reaction were added?
If the added substance is a reactant, the equilibrium shifts toward products. If it is a product, it moves towards reactants.
How can the enthalpy change be determined for a reaction in an aqueous solution?
Utilizing a thermometer to measure the temperature change of the solution can be used (along with the mass of the reactant(s)) to determine the enthalpy change for an aqueous reaction, as long as the reaction is carried out in a calorimeter or similar apparatus so that no external heat is added or removed from the system.
Are substrates and reactants the same?
No, substrates are the molecules upon which an enzyme acts to produce a reaction, while reactants are the starting materials that interact to undergo a chemical reaction. In some cases, the substrate itself might be a reactant in a given biochemical system, but not all reactants are substrates.
Why limiting reactant is not applicable to reversible processes?
In reversible processes, reactants can convert back and forth into products, making it difficult to distinguish a limiting reactant. The system reaches equilibrium with both reactants present, rather than one being completely consumed. Therefore, the concept of a limiting reactant does not apply to reversible processes.
Which is a reactant for the reaction that is powered by hitting photo system II?
ADP
How is heat included in the equation of an exothermic reaction?
Heat is written as a product of the reaction (apecs answer)
Adding products to systems at equililbrium will do what?
In general, adding product to a system at equilibrium will push the reaction toward the reactant side.
What will happen when a reactant is added to a system at equilibrium?
The equilibrium of the system will be upset.
According to Le Chatelier principle what happens if heat is added to a system?
The reaction shifts to remove the heat APEX
How factors affect rates of physical change?
-Reactant Concentration • The greater the concentration of reactants (the more particles per unit volume), the greater will be the number of effective collisions per unit time, and therefore, the reaction rate will generally increase. • For zero order reactions, however, the reaction rate is not dependent on the concentration of reactants. Increasing the reactant concentration will have no effect on the rate. -Temperature • The reaction rate will increase as the temperature of the system increases. As the temperature increases, the reactant molecules have more energy. They thus find it easier to climb the energy barrier to the reaction (the activation energy). -Solvent • The reaction rate will increase as the temperature of the system increases. As the temperature increases, the reactant molecules have more energy. They thus find it easier to climb the energy barrier to the reaction (the activation energy).
Describe what can happen to the reaction rate of a system that is heated then cooled?
Heating a system typically increases the reaction rate as the molecules have more energy to react. Cooling the system will usually slow down the reaction rate as the molecules have lower energy levels, leading to fewer successful collisions between reactant molecules.
Is carbon a product or reactant?
Carbon can be both a reactant and a product in chemical reactions. It can act as a reactant by combining with other elements to form compounds, or it can be produced as a product when carbon-containing compounds are broken down or converted into other substances.
When is a reaction said to be endothermic?
A reaction is said to be endothermic when it absorbs heat from its surroundings, which means that heat is a reactant in the reaction. This results in a decrease in the temperature of the surroundings.
How does a system at equilibrium respond to the addition of more reactant or Product?
Le Chetalier's Principle states "If to a system in equilibrium, a change is applied, the system will react to tend to negate that change" - or the substance of that statement. So if you add product, the system will tend to go to the reverse reaction and produce more reactant. Vice Versa. If more reactant is added, the system reacts to make more product to restore equilibrium.
What happens when reactant is added to a system at equilibrium?
The equilibrium of the system will be upset.
Ram is powered when the system is unplugged by?
The RAM ( Random Access Memory) is NOT powered when the system is powered down Unless the system is in Stand-by.
