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there are a number of ways:
you could put that system into direct thermal contact with another system of a higher temperature, which would result in a conduction of heat energy from the higher energy system to the lower one. Or you could fire radiation at the system which the system absorbs and thus its internal energy is raised. I think you might increase the energy if you decrease the volume under pressure, because the temperature will increase and you will have done work on the system, hence increasing it internal energy. Like wise, if you spray a deodorant can, it comes out cold, because the compressed gas has done work on the atmosphere, and used up internal energy, hence it feels cold.
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∙ 14y ago
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What is meant by conservation of energy in a closed system?
Closed system means that no energy enters or leaves the system; conservation means that in this case, the total amount of energy will not increase, nor decrease.
What do scientists mean when they say energy can never be destroyed?
It means that the total amount of energy in a closed system - a system that has no contact with the outside world - will neither increase nor decrease.
What does 'law and conservation of energy' mean?
It means that energy is conserved; that is, the total amount of energy will neither increase nor decrease.
What does external energy mean?
It means energy outside of the system you are considering.
How is the energy of a sound wave related to its measured value on a decibal scale?
The decibel scale is a logarithmic scale. An increase of 10 points on the decibel scale means that the energy increases by a factor 10; an increase of 20 decibels means an energy increase by a factor of 10 x 10 = 100, etc.
Does internal energy of system depends upon volume?
Internal energy is an extensive state function. That means it depends on how much of a substance you have but if you fix the composition, pressure, temperature, volume, and (in the case of a system at a phase equlibrium point, like water at the freezing point) the phase of a system, the specific internal energy will be constant. If you take a closed system and change the volume of it, you will be doing work (or allowing the system to do work) and the internal energy can change - so - yes - internal energy of a system depends upon volume. Also, if you fix the composition, temperature, pressure, and phase of a homogeneous mass but change the volume, you will increase the amount of mass you included in the system, thus changing the total internal energy (because it is, after all, an extensive function).
What is meant by conservation of energy in a closed system?
Closed system means that no energy enters or leaves the system; conservation means that in this case, the total amount of energy will not increase, nor decrease.
What does conseervation of energy mean?
Conservation of energy means that the total energy of a system remains constant no matter what the internal changes are.
What is the first law of thermodynamics applied to closed and open system showing the meaning of the positive and negative sign of heat and work?
The first law of thermodynamics states that: "The internal energy of a system is a function of its state. Any increase in the internal energy of a system is equal to the sum of the heat supplied to the system and the work done on the system." In equations, this is stated as: DU = DQ + DW where DU is the INCREASE in internal energy DQ is the heat SUPPLIED DW is the work done ON the system So, if heat is lost by the system, it means that DQ is negative and if work is done by the system, it means that DW is negative. The best way to answer thermodynamics questions involving the first law is to think logically about what calculations should be made. If you do this, you will never make mistakes about signs.
What is law of conservations of energy?
It means that the total amount of energy in a closed system will neither increase nor decrease.
What do scientists mean when they say energy can never be destroyed?
It means that the total amount of energy in a closed system - a system that has no contact with the outside world - will neither increase nor decrease.
How do cows maintain their internal levels?
They are warmblooded creatures, like all mammals are, and able to maintain their internal levels through the energy they get from eating every day. This energy is called "metabolizable energy" which means that a cow is able to generate (never create) energy to keep her internal system at a constant temperature and functionable. Osmosis and Homeostasis is also important to maintain internal liquid levels.
What means internal transport of animal?
It means circulatory system
What type of energy is converted to energ of motion in an internal combustion engine?
In an internal combustion engine, the provided energy is chemical energy. By means of combustion it is transformed into heat energy. This heat energy is transformed in to motion/kinetic energy in an internal combustion engine.
When enthalpy in a system increases what is the reaction considered to be?
When enthalpy in a system increases, the reaction is considered to be endothermic. This means that heat is being absorbed from the surroundings, resulting in an increase in the energy of the system.
How cow maintain homeostasis?
They are warmblooded creatures, like all mammals are, and able to maintain their internal levels through the energy they get from eating every day. This energy is called "metabolizable energy" which means that a cow is able to generate (never create) energy to keep her internal system at a constant temperature and functionable. Osmosis and Homeostasis is also important to maintain internal liquid levels
What is the first law energy?
That probably refers to the First Law of Thermodynamics, also known as the Law of Conservation of Energy. It means that the total amount of energy in a closed system (for example, in the Universe) can't increase or decrease.
