In which of the following standard entha...

In which of the following standard enthalpy of formation `(Delta H_(f)^(0))` is zero ?

`Br_(2) (g)`

`CO_(2) (g)`

`H_(2) O(l)`

`Cl_(2) (g)`

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At 25^(@)C which of the following has enthalpy of formation zero ?

At 25^(@)C which of the following has enthalpy of formation zero-

Between O_(2)(g) and O_(3)(g) , whose standard enthalpy of formation (DeltaH_(f)^(0)) is taken as zero at 1 atm and 25^(@)C ?

Which of the following reaction does not define standard enthalpy of formation (Delta H_f^@) ?

In which of the following reactions does DeltaH^(0) at 25^(@)C indicate the standard enthalpy of formation (DeltaH_(f)^(0)) of the compound formed in each of the reactions? (2) N_(2)(g)+3H_(2)(g)to2NH_(3)(g) (2) (1)/(2)N_(2)(g)+(1)/(3)O_(3)(g)toNO(g) .

In which of the following reactions, standard reaction entropy changes (DeltaS^@) is positive and standard Gibb’s energy change (DeltaG^@) decreases sharply with increasing temperature?

Which of the following element standard enthalpy is not to be equal to zero?

For which of the following reactions does the standard enthalpy of reaction represent the standard enthalpy of formation of CH_(4)(g) ? Explain it. (a) C(diamond, s) +4H_(2)(g)toCH_(4)(g) (b) C(graphite, s) +O_(2)(g)toCH_(4)(g) .

In which of the following reactions At 25^(@)C , does the standard enthalpy change correspond to the standard enthalpy of formation of H_(2)O(l) ? Give reasons. (i) H_(2)(g) +(3)/(2)O_(3)(g) to H_(2)O(l) (ii) H_(2)(g)+(1)/(2)O_(2)(g)toH_(2)O(l) (iii) 2H(g)+O_(2)(g) to H_(2)O(l) .

CHHAYA PUBLICATION-PREVIOUS YEAR QUESTION PAPER 2019-WBJEE 2019

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