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Class-11,Thermodynamics
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Q1) Thermodynamics is the branch of physical science concerned with
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heat and its transformations to and from other forms of energy
mass and its transformations to and from other forms of energy
kinetic energy and its transformations to and from other forms of energy
Potential and its transformations to and from other forms of energy
Q2) In a closed system, Which of the following take place ?
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The boundaries permit the flow of matter into or out of it
The boundaries permit the flow of matter into it but not vice versa.
The boundaries prevent the flow of matter out of it but not vice versa
The boundaries prevent the flow of matter into or out of it.
Q3) In an open system, which if the following take place ?
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The boundaries permit the flow of matter into or out of it
The boundaries prevent the flow of matter into or out of it
The boundaries prevent the flow of matter but not of energy
The boundaries prevent the flow of energy into it
Q4) first law of thermodynamics is a restatement of
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law of conservation of charge
law of conservation of parity
law of conservation of mass
law of conservation of energy
Q5) According to first law of thermodynamics ΔU = q + w, here what is sign of q and w ?
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'q' is positive if heat is transferred into the system and 'w' is positive if work is done on the system.
'q' is positive if heat is transferred into the system and 'w' is positive if work is done by the system.
'q' is negative if heat is transferred into the system and 'w' is negative if work is done on the system
'q' is negative if heat is transferred from the system and 'w' is negative if work is done by the system
Q6) The molar specific heat capacity of a substance is the
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quantity of heat needed to raise the temperature of one mole by one degree celsius or one kelvin.
quantity of heat needed to raise the temperature of one kilogram by one degree Fahrenheit
quantity of heat needed to raise the temperature of one gram by one degree celsius
quantity of heat needed to raise the temperature of one mole by one degree Fahrenheit
Q7) Calorimetry is an experimental technique or process of
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measuring the maximum pressure developed in a reaction
measuring the amount of work done in a reaction
measuring the amount of chemicals consumed
measuring the energy changes associated with chemical or physical processes.
Q8) An exothermic process
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results in a decrease in the enthalpy of the system
results in a increase in the enthalpy of the system
results in a increase in the internal energy of the system
results in a decrease in the temperature of the system
Q9) Standard enthalpy of fusion or molar enthalpy of fusion is
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The enthalpy change that accompanies vaporization of one mole of a solid substance in standard state
The enthalpy change that accompanies vaporization of one kg of a solid substance in standard state
The enthalpy change that accompanies melting of one mole of a solid substance in standard state.
The enthalpy change that accompanies melting of one kg of a solid substance in standard state
Q10) Standard Molar Enthalpy of Formation is
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The standard enthalpy change for the formation of one mole of a compound from its elements in their most stable states of aggregation.
The standard enthalpy change for the formation of one mole of a compound from its elements in at a pressure of 10 bar and 30∘ C.
The standard enthalpy change for the formation of one kg of a compound from its elements in their most stable states of aggregation.
The standard enthalpy change for the formation of one mole of a compound from its elements in at a pressure of 2 bar and 25∘ C.
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