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Thermodynamics Test - 23

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Thermodynamics Test - 23
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  • Question 1
    1 / -0
    Which of the following is an example of an open system?
    Solution
    $$Answer:-$$ A
    In thermodynamics, a closed system can exchange energy (as heat or work) but not matter, with its surroundings. An isolated systemcannot exchange any heat, work, or matter with the surroundings, while an open system can exchange energy and matter.
    A beaker full of water can exchange both energy(it can be heated) as well as matter(water can be taken out).
    But in other two exchange of matter is nor possible so not open system.

  • Question 2
    1 / -0
    Universe comprises of :
    Solution
    Both System and Surroundings Comprises Universe.

    Option C is correct.
  • Question 3
    1 / -0
    An isolated system can exchange :
    Solution
    $$Answer:-$$ D
    In thermodynamics, a closed system can exchange energy (as heat or work) but not matter, with its surroundings. An isolated system cannot exchange any heat, work, or matter with the surroundings, while an open system can exchange energy and matter.

  • Question 4
    1 / -0
    Which of the following is an extensive property?
    Solution
    $$Answer:-$$ A
    An extensive property is a property that changes when the size of the sample changes. Examples are mass, volume, length, and total charge.

    An intensive property doesn't change when you take away some of the sample. Examples are temperature, color, hardness, melting point, boiling point, pressure, molecular weight, and density. Because intensive properties are sometimes characteristic of a particular material, they can be helpful as clues in identifying unknown substances.

  • Question 5
    1 / -0
    A closed system can exchange :
    Solution
    $$Answer:-$$ B
    In thermodynamics, a closed system can exchange energy (as heat or work) but not matter, with its surroundings. An isolated system cannot exchange any heat, work, or matter with the surroundings, while an open system can exchange energy and matter.

  • Question 6
    1 / -0
    Who formulated the Zeroth law of thermodynamics?
    Solution
    $$Answer:-$$ A
    According to Arnold Sommerfeld, $$Ralph\ H.\ Fowler$$ invented the title 'the zeroth law of thermodynamics' when he was discussing the 1935 text of Saha and Srivastava. They write  that "every physical quantity must be measurable in numerical terms". They presume that temperature is a physical quantity and then deduce the statement "If a body A is in temperature equilibrium with two bodies B and C, then B and C themselves will be in temperature equilibrium with each other". 
  • Question 7
    1 / -0
    An open system can exchange :
    Solution
    $$Answer:-$$  C
    An open system is a system that has external interactions. Such interactions can take the form of information, energy, or material transfers into or out of the system boundary, depending on the discipline which defines the concept. An open system is contrasted with the concept of an isolated system which exchanges neither energy, matter, nor information with its environment. An open system is also known as a constant volume system or a flow system.

  • Question 8
    1 / -0
    An application of the Zeroth Law of Thermodynamics is
    Solution
    $$Answer:-$$ A
    The zeroth law justifies the use of suitable thermodynamic systems as thermometers to provide such a labeling, which yield any number of possible emprical temperature scales, and justifies the use of second law of thermodynamics to provide an absolute, or thermodynamic temperature scale. Such temperature scales bring additional continuity and ordering (i.e., "hot" and "cold") properties to the concept of temperature.
  • Question 9
    1 / -0
    Zeroth law of thermodynamics
    Solution
    $$Answer:-$$ C
    The zeroth law of thermodynamics states that if two thermodynamic system are each in thermal equilibrium with a third, then they are in thermal equilibrium with each other.
  • Question 10
    1 / -0
    An intensive property is defined as a:
    Solution
    $$Answer:-$$ B

    An intensive property is a bulk property, meaning that it is a physical property of a system that does not depend on the system size or the amount of material in the system. Examples of intensive properties include temperature(T), refractive index (n), density, and hardness of an object. When a diamond is cut, the pieces maintain their intrinsic hardness (until their size reaches a few atoms thick), so hardness is independent of the size of the system.

    By contrast, an extensive property is additive for subsystems. This means the system could be divided into any number of subsystems, and the extensive property measured for each subsystem; the value of the property for the system would be the sum of the property for each subsystem. For example, both the mass, and the volume, of a diamond are directly proportional to the amount that is left after cutting it from the raw mineral. Mass and volume are extensive properties, but hardness is intensive.

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