What is the unit for work in S.I. system? from Chemistry Therm

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 Multiple Choice QuestionsShort Answer Type

21.

In which ways the internal energy of a system can be changed?

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22.

What happens to the internal energy of a system if:
(i) Work is done on the system
(ii) Work is done by the sytem?

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23.

Why internal energy is a state function but is not work?

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24.

What is the relationship between internal energy change and enthalpy change?

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25. Can we determine the exact value of internal energy of a substance?
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26.

What is heat(q)?

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27.

What is the unit for work in S.I. system?


It is joule (J). 1 calorie = 4.184 Joules
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28.

For the same increase in volume, why work done is more if the gas is allowed to expand reversibly at higher temperature?

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29.

Define the law of conservation of energy.

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30. State the first law of thermodynamics.
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