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Specific and Molar heat ..



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Q1. If the amount of heat given to a system is 35 J and the amount of work done by the system is -15J and the amount of work done by the system is -15J, then the change in the internal energy of the system is?

(a) -50J
(b) 20J
(c) 30
(d) 50J

Q2. The latent heat of vaporisation of water is 2,240 J. If the work done in the process of vaporisation of 1g is 168 J, then the increase in internal energy is?

(a) 2408 J
(b) 2240 J
(c) 2072 J
(d) 1904 J

Q3. Which is an intensive property?

(a) Volume
(b) Mass
(c) Refractive index
(d) Weight

Q4. Which statement is incorrect?

(a) All reversible cycles have the same efficiency
(b) Reversible cycle has more efficiency than an irreversible one
(c) Carnot cycle is a reversible one
(d) Carnot cycle has the maximum efficiency of the cycles

Q5. The mechanical energy can be completely converted into heat energy but the whole of the heat energy cannot be converted into mechanical energy.

(a) True
(b) False
(c) Both acidolysis and aldehyde
(d) None of the mentioned

Q6. It is possible that the temperature of the body changes even without giving heat to it or taking heat from it.

(a) True
(b) False
(c) Both acidolysis and aldehyde
(d) None of the mentioned

Q7. The change internal energy in a cyclic process is ___________

(a) Zero
(b) Infinity
(c) Constant
(d) Unity

Q8. The molar specific heat constant pressure of an ideal gas is 7R/2. The ratio of specific heat at constant pressure to that at constant volume is?

(a) 9/7
(b) 8/7
(c) 7/5
(d) 5/7

Q9. 110 J of heat is added to a gaseous system, whose internal energy increases by 40 J. Then the amount of external work done is?

(a) 150 J
(b) 70 J
(c) 110 J
(d) 40 J

Q10. The internal energy change in a system that has absorbed 2kcal of heat and done 500 J of work is?

(a) 6400 J
(b) 5400 J
(c) 7900 J
(d) 8900 J


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The Relation Between H And U Is

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The Relation Between H And U Is

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A Well Stoppered Thermos Flask Contains Some Ice Cubes. This Is An Example Of A

Modified 237 Year Ago Bhavna

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A Well Stoppered Thermos Flask Contains Some Ice Cubes. This Is An Example Of A

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Three Moles Of An Ideal Gas Expanded Spontaneously Into Vacuum. The Work Done Will Be

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Three Moles Of An Ideal Gas Expanded Spontaneously Into Vacuum. The Work Done Will Be

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In Order To Decompose 9 G Water 142.5 KJ Heat Is Required. Hence, The Enthalpy Of Formation Of Water Is

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In Order To Decompose 9 G Water 142.5 KJ Heat Is Required. Hence, The Enthalpy Of Formation Of Water Is

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352 views

Changes In A System From An Initial State To The Final State Were Made By A Different Manner That ΔH Remains Same But Q Changes Because

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If W Is The Amount Of Work Done By The System And Q Is The Amount Of Heat Supplied To The System. Identify The Type Of The System

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