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The amount of energy which a system has to have in order for a chemical change to take place?
Wiki User
∙ 13y ago
The activation energy.
Wiki User
∙ 13y ago
Wiki User
∙ 11y agoActivation Energy
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What is needed to create change in a system?
The amount of energy is used to make the change.
The amount of power derived from a device or system is its?
That amount is always less than the energy you put into the system. Divide the amount of useful energy you get from a system by the amount of energy you put into it, and you find the system's 'efficiency'.
What is the total amount of kinetic energy and potential energy in a system?
Internal energy at the microscopic level and thermodynamic or mechanical energy at the macroscopic level.
When a car burns fuel which of following best describes what happens to the energy of the system?
Chemical energy is transformed to mechanical energy and some heat energy
A caalorie is the amount of energy needed to?
Calorie is the unit of heat energy in cgs system. One calorie is the heat energy required to raise the temperature of one gram of water through one degree Celsius. But in MKSA system of units, joule is used as the unit of heat energy. One calorie is equal to 4.180 joule. Calorie is usually used in bio chemical changes.
What is the amount of energy which a system has to have in order for a chemical change to take place?
That is officially called the activation energy.
What is needed to create change in a system?
The amount of energy is used to make the change.
A graph plotting the energy change of a system as a chemical reaction proceeds is called what?
Energy diagram.
Is it true that the amount of heat in a closed system is constant?
No, it is net amount of energy in a close system is constant. Energy can change form from thermal to kinetic to electrical and so on. It is only the net amount of energy that is conserved in the close system.
What is the law of conversation of mass?
the law of conversation of mass states that mass is neither created nor destroyed in a chemical reaction. meaning that the total mass in a chemical reaction doesn't change.
What is the definition for energy change?
Energy change refers to the difference in the amount of energy of a system before and after a process. It can be in the form of heat, work, or a combination of both. Energy change is typically quantified in units such as joules or calories.
The amount of power derived from a device or system is its?
That amount is always less than the energy you put into the system. Divide the amount of useful energy you get from a system by the amount of energy you put into it, and you find the system's 'efficiency'.
What is different between exothermic and endothermic reactions?
If energy is released as a result of a process, an exothermic change has taken place. If a constant input of energy is required to drive a physical or chemical change, the change is described as endothermic.
Why is Energy loss equal to Energy gain?
Whether total energy output is equal to the energy input depends on whether you have an isolated system. It is possible to put more energy into a system than leaves it and vice versa. In that case accumulation of energy in the system can be positive or negative. In general, the formula for the energy balance is: Energy in - Energy out = Change in contained energy (i.e. accumulation). Energy can be added to or removed from a system via work done on (or by) the system, heat added to or removed from the system, and mass added to or removed from the system. Energy can change form in a system or be added or removed from a system via such mechanisms as changes in kinetic energy, changes in potential energy, changes in pressure/volume, phase changes, changes in chemical composition (chemical reactions), etc. In steady state processes, accumulation has to be zero, so any energy input, by any means, must be balanced by energy output.
What is The first law of Themodynamics?
* First law of thermodynamics, about the conservation of energy: : :: The change in the internal energy of a closed thermodynamic system is equal to the sum of the amount of heat energy supplied to the system and the work done on the system. --from Wikipedia
What is the principle of the conservation of mass?
It is where if nothing is let in or let out of a substance the mass will not change. For example, if you had a bottle with a substance in it and nothing passed in or out of that bottle, the mass would be the same no matter if a chemical reaction occurred inside the bottle. This makes sense, since mass is made up of atoms, and if the amount of atoms is the same then the mass won't change.
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
