Class 11 Exam > Class 11 Questions > The First Law of Thermodynamics states that:a...
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The First Law of Thermodynamics states that:
- a)ΔQ - W = ΔU
- b)ΔQ - ΔW = U
- c)ΔQ - ΔU = ΔW
- d)Q - W = U
Correct answer is option 'C'. Can you explain this answer?
Verified Answer
The First Law of Thermodynamics states that:a)ΔQ - W =ΔUb)&#...
The first law of thermodynamics states that the total energy of an isolated system is constant. Energy can be transformed from one form to another, but can neither be created nor destroyed.
According to this law, some of the heat given to system is used to change the internal energy while the rest in doing work by the system. Mathematically,
ΔQ=ΔU+ΔW
where,
ΔQ = Heat supplied to the system
ΔW= Work done by the system.
ΔU = Change in the internal energy of the system.
If Q is positive, then there is a net heat transfer into the system, if W is positive, then there is work done by the system. So positive Q adds energy to the system and positive W takes energy from the system.
It can also be represented as ΔU=ΔQ-ΔW
We can say that internal energy tends to increase when heat is given to the system and vice versa.
Most Upvoted Answer
The First Law of Thermodynamics states that:a)ΔQ - W =ΔUb)&#...
The first law of thermodynamics states that the total energy of an isolated system is constant. Energy can be transformed from one form to another, but can neither be created nor destroyed.
According to this law, some of the heat given to system is used to change the internal energy while the rest in doing work by the system. Mathematically,
ΔQ=ΔU+ΔW
where,
ΔQ = Heat supplied to the system
ΔW= Work done by the system.
ΔU = Change in the internal energy of the system.
If Q is positive, then there is a net heat transfer into the system, if W is positive, then there is work done by the system. So positive Q adds energy to the system and positive W takes energy from the system.
It can also be represented as ΔU=ΔQ-ΔW
We can say that internal energy tends to increase when heat is given to the system and vice versa.
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The First Law of Thermodynamics states that:a)ΔQ - W =ΔUb)&#...
The First Law of Thermodynamics
The First Law of Thermodynamics can be expressed as:
Q - U = W
Explanation:
Q: This represents the heat added to the system.
U: This represents the internal energy of the system.
W: This represents the work done by the system.
When heat (Q) is added to a system, it can either increase the internal energy (U) of the system or do work (W). The First Law of Thermodynamics states that the change in internal energy of a system is equal to the heat added to the system minus the work done by the system.
In simpler terms, the First Law of Thermodynamics is a statement of the conservation of energy. Energy can neither be created nor destroyed, but it can be transferred from one form to another. This law helps us understand how energy flows in and out of a system, and how it can be used to perform work.
In conclusion, the First Law of Thermodynamics is a fundamental principle in the study of energy and its interactions with matter. It provides a basis for understanding the behavior of systems in terms of heat, work, and internal energy.
The First Law of Thermodynamics can be expressed as:
Q - U = W
Explanation:
Q: This represents the heat added to the system.
U: This represents the internal energy of the system.
W: This represents the work done by the system.
When heat (Q) is added to a system, it can either increase the internal energy (U) of the system or do work (W). The First Law of Thermodynamics states that the change in internal energy of a system is equal to the heat added to the system minus the work done by the system.
In simpler terms, the First Law of Thermodynamics is a statement of the conservation of energy. Energy can neither be created nor destroyed, but it can be transferred from one form to another. This law helps us understand how energy flows in and out of a system, and how it can be used to perform work.
In conclusion, the First Law of Thermodynamics is a fundamental principle in the study of energy and its interactions with matter. It provides a basis for understanding the behavior of systems in terms of heat, work, and internal energy.
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