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1st Year Chemistry Short Questions (Chapter 7)

 If you are in 1st year class



And searching for important short questions for your exams preparation than read it out 


Here is some short questions from chapter 7 of 1st year



INTRODUCTION 


1. What is thermochemistry Why it has limited scope?


2. What is the difference b/w exothermic & endothermic reactions?


3. What are thermochemical equations. Give two examples 


4. Why is it necessary to mention physical and chemical states of reactant & products in thermochemical equations?


5. Why heat evolve in exothermic reactions & heat absorb in endothermic reactions?


SYSTEM, SURRONDING AND STATE FUNCTION


6. Define system, surrounding& boundary with examples of each


7. Define state & state function with two examples


SPONTANEOUS & NON-SPONTANEOUS REACTIONS


8. Differentiate spontaneous & non-spontaneous reactions


9. Explain that burning of candle (Coal) is a spontaneous process.


10. Is it true that non-spontaneous process never happened in the universe? Explain


11. Is it necessary that spontaneous reactions are always exothermic in nature


INTERNAL ENERGY & 1ST LAW OF THERMODYNAMICS 


12. State first law of themodynamics & give its mathematical form


13. What is internal energy?


14. What are methods of transferring energy? What is pressure-volume work


ENTHALPY 


15. Define the term enthalpy


16. Differentiate b/w enthalpy & internal energy


17. ∆H & ∆E have the same value for the reaction taking place in the liquid state. Why ?


18. Prove that ∆H=qp


19. Define standard heat of reaction. Can it be negative?


20. Why enthalpy of neutralalization has same value for any strong acid & Strong base 


21. Define enthalpy of (formation, atomization, neutralization, combustion &solution) withs uitable example


CALORIMETERS 


22. How do you determine ∆H in the laboratory for food, fuel etc.?


23. For what purpose bomb calorimeter is used?


24. Draw labelled diagram of Glass & bomb calorimeter


25. Define heat capacity


HESS'S LAW & BORN HABER CYCLE 


26. Why enthalpy of formation of many compounds cannot be found using Calorimeter.


27. How enthalpy of formation of CO is determined by using Hess's law?


28. State Hess's law of constant heat summation 


29. Hess's law is in accordance with law of conservation of energy.


30. What is lattice energy? Give example


31. What is Born-Haber cycle?


32. Draw complete labelled Born-Haber cycle for NaCl formation 




REGARDS : TALHA



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