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In a thermal decomposition reaction, sign of H may be...

A. positive   

B. negative

C. No sign

D. positive or negative.

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  1. In a spontaneous irreversible process, the total entropy of the system & its surroundings
  2. Internal energy of the elements is assigned a value of................................cal per mole at…
  3. The heat change taking place in the reactionH2 OI→H2Og,∆HfH2 Og=-57K Cal∆HfH2 OI=68.3K Cal is..?
  4. On burning hydrogen in an atmosphere of chlorine, 1.65 gm of HC1 was obtained and 1 Kcal of heat was…
  5. 1 Joule is equal to
  6. A person requires 2870 Kcal of energy for leading a normal life. If heat of combustion of cane sugar…
  7. Heat of reaction
  8. 35.5 gm of chlorine gas is allowed to expand freely in vacuum at 25°C. Then AH for this process…
  9. The factor that does not influence the heat of reaction is...
  10. The total heat content of a system is known as....
  11. For the reaction C+O2→CO2        ∆H1=394 KJ mole-12CO+O2→2CO2∆H2=569 KJ∆H for 1 mole formation of CO is...?
  12. A person requires 2870 Kcal of energy for leading a normal life. If heat of combustion of cane sugar…
  13. Heat of neutralisation of HCI and NaOH is -57.32 KJ per gram equivalent and that of acetic acid and…
  14. In a thermal decomposition reaction, sign of ∆H may be...
  15. The molar entropy of vaporisation of a liquid at its boiling point is
  16. Heat of combustion of methane and ethane are -291.7 Kcal & — 441.2 Kcal respectively:
  17. In reaction Cs+O2g→CO2g ∆H=-94.3 K cal mol-1
  18. The heat of neutralisation of a strong acid and a strong base is equal to......................K.Cal gm eq-1
  19. Heat of Reaction between sodium hydroxide and hydrochloric acid is 57.32 KJ mole-1. So heat of…
  20. The enthalpy of the elements in their standard states is taken as zero. So the enthalpy of formation…
  21. If temperature is kept constant during the reaction, the process is said to be.......................
  22. The apparatus used for measuring the heat changes is known as ...
  23. Heat of combustion of S (Rhombic) and S (monoclinic) are -297.5 KJ and -300 KJ mole-1 respectively.…
  24. 10 gm of ice at 0°C is placed into 100 gm of water at 50°C. Hie temperature of water after the…
  25. Heat of fusion of a molecular solid is
  26. The solution energy of AI+++ion is more than that of Mg+++ due to...
  27. The highest temperature at which vapour pressure of a liquid can be measured is..
  28. For a reaction 2 SO2g+O2g→2 SO3;g∆G°=-141.8 KJ-1So the driving force…