0
Either A change in temperature A change in state Formation of a new substance Disappearance of one or more reactants?
All these following are remarquable.
Some indicators of a chemical reaction are:
- change of color
- change of odor
- release of a gas
- change of the temperature
- change of the viscosity
- formation of a precipitate
- change of general appearance
- possible explosion
- possible chemiluminescence -formation of new compoundsVery probable the formation of new compounds is the most important.
What else can I help you with?
How do you know that a new substance is formed from the reaction?
A new substance is formed in a chemical reaction if there is a change in properties, such as color, odor, temperature, or formation of a precipitate. Additionally, if the chemical composition of the reactants and products differ, it indicates a new substance has been formed. Chemical tests and analytical techniques can also be used to confirm the presence of a new substance.
What is disappearance of a substance in known as?
The disappearance of a substance is known as "depletion." This term is often used in various contexts, including environmental science, chemistry, and resource management, to describe the reduction or exhaustion of a particular material or resource. Depletion can refer to the diminishing quantity of natural resources, such as fossil fuels or freshwater, or the reduction of reactants in a chemical reaction.
If you have the heat of formation of a substance at a given temperature how do you calculate its heat of formation at a different temperature?
To calculate the heat of formation of a substance at a different temperature, you can use the heat capacity of the substance to adjust for the change in temperature. You would need to integrate the heat capacity over the temperature range to determine the change in enthalpy and then correct the heat of formation using this adjusted value.
The only sure evidence for a chemical reaction is?
A kind of chemical bond in the possible reaction products that did not exist in the reactants, or a kind of chemical bond in the reactants that does not exist in the possible reaction products.
What best describe the enthalpy of formation of a substance?
The enthalpy of formation of a substance is the energy change when a substance is formed from its elements in their standard states. It represents the heat energy released or absorbed during the formation process. A negative value indicates that the reaction is exothermic, while a positive value indicates an endothermic reaction.
How is the enthalpy of reaction related to the enthalpies of formation for the products and reactants?
The difference between the enthalpy of formation of the products minus the enthalpy of formation of the reactants is the enthalpy of the reaction
What describes a change that occurs when one substance reacts with another substance?
A chemical reaction occurs when one substance reacts with another, resulting in the formation of new products with different properties. This change involves the breaking of existing bonds in the reactants and the formation of new bonds to create the products.
What is the average rate of disappearance for the substance in this chemical reaction?
The average rate of disappearance for a substance in a chemical reaction is the speed at which the substance is used up over time. It is calculated by dividing the change in concentration of the substance by the change in time.
When are reactants referred to as substance?
All reactants are compounds or elements.During a chemical reaction reactants are transformed in products.
How to calculate the enthalpy of combustion for a given substance?
To calculate the enthalpy of combustion for a substance, you need to determine the amount of heat released when one mole of the substance is completely burned in oxygen. This can be done by subtracting the sum of the enthalpies of formation of the products from the sum of the enthalpies of formation of the reactants. The enthalpy of combustion is typically expressed in kilojoules per mole.
The substance listed on the left side of the chemical equation are the?
reactants. by benda bvenjamen
What best describes the enthalpy of formation of a substance?
The energy change that happens when a substance forms from its elements (APEX)
