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What are three clues that a chemical change has occured?
Three clues that a chemical change has occurred:Color changesa precipitate formsa gas forms
What is the relationship between enthalpy, entropy, and free energy in a chemical reaction?
In a chemical reaction, enthalpy, entropy, and free energy are related. Enthalpy is the heat energy exchanged during a reaction, entropy is the measure of disorder or randomness, and free energy is the energy available to do work. The relationship between these three factors is described by the Gibbs free energy equation: G H - TS, where G is the change in free energy, H is the change in enthalpy, S is the change in entropy, and T is the temperature in Kelvin. This equation shows that for a reaction to be spontaneous, the change in free energy must be negative, meaning that the enthalpy change and entropy change must work together in the right direction.
Chemical reactions can be detected by changes in?
Temperature change. The fourth class of reactions is much more difficult to detect than the previous three. This fourth class is really the basis of the other three. Every chemical reaction involves energy in some form, because all chemical reactions involve the breaking of old bonds, the forming of new bonds, or both. We know that every chemical bond contains energy, or it would not exist. This result means that every chemical reaction involves an energy change because the bonds are changed. Energy tied up in the bonds of atoms, molecules, ions, and the rest of the chemical system is called enthalpy. The absolute amount of this energy cannot be measured, but the change in enthalpy from the reactants to products can be measured. If the energy is lost (given off), the reaction is exothermic; if energy is gained, the reaction is endothermic
What are three things that show evidence of a chemical reaction?
There are five things:Color changeodorstate change (from liquid to solid, liquid to gas, etc...),gives off at precipitatea temperature change
What are 3 list of chemical change?
You know a chemical change happened if: -A change in color -Formation of a precipate (a solid) -Formation of a gas
What are the three energies needed in order to clean dishes?
The three energies typically needed to clean dishes are physical energy for scrubbing and lifting, thermal energy for heating water to the appropriate temperature, and chemical energy from dish soap to break down grease and food particles.
Name three sources of chemical energy?
what are the three sources of chemical energy
What are three clues that a chemical change has occured?
Three clues that a chemical change has occurred:Color changesa precipitate formsa gas forms
What are the three energy conversions that might occur in a power plant?
I think is a fuel in a substance that provides to form of energy such as heat, light, electricity, or motion as the result of a chemical change.
What are three energy conversions that might occur in a power plant?
I think is a fuel in a substance that provides to form of energy such as heat, light, electricity, or motion as the result of a chemical change.
What are three different forms of energy being transformed from the potential chemical energy of wood in a campfire?
thermal, light, and chemical
What are the three types of energy that may be used to produce current.and list three devices that provide this type of energy?
The three types of energy used to produce electricity are mechanical energy (from motion), chemical energy (from reactions), and radiant energy (from sunlight). Devices that provide these types of energy include generators (mechanical energy), batteries (chemical energy), and solar panels (radiant energy).
What is the three form of energy?
The three forms of energy are kinetic energy (energy of motion), potential energy (stored energy), and thermal energy (energy due to temperature).
What are the three types of stored energy?
They are nuclear, chemical, and electrical.
What are three forms of energy that can be changed into electrical energy?
Three forms of energy that can be changed into electrical energy are mechanical energy (such as from turbines or generators), light energy (as in solar panels), and chemical energy (through batteries or fuel cells).
What is the relationship between enthalpy, entropy, and free energy in a chemical reaction?
In a chemical reaction, enthalpy, entropy, and free energy are related. Enthalpy is the heat energy exchanged during a reaction, entropy is the measure of disorder or randomness, and free energy is the energy available to do work. The relationship between these three factors is described by the Gibbs free energy equation: G H - TS, where G is the change in free energy, H is the change in enthalpy, S is the change in entropy, and T is the temperature in Kelvin. This equation shows that for a reaction to be spontaneous, the change in free energy must be negative, meaning that the enthalpy change and entropy change must work together in the right direction.
What are three clues that a chemical has occurred?
Three clues that a chemical change has occurred:Color changesa precipitate formsa gas forms
