1. Tardigrade
  2. Question
  3. Chemistry
  4. On the basis of thermochemical equations (a), (b) and (c), find out which of the algebric relationships given in options (i) to (iv) is correct. (1) C (graphite) + O 2( g ) longrightarrow CO 2( g ) ; Δ rH = x kJ mol -1 (2) C (graphite) +(1/2) O 2( g ) longrightarrow CO ( g ) ; Δ rH = y kJ mol -1 (3) CO ( g )+(1/2) O 2( g ) longrightarrow CO 2( g )

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Q. On the basis of thermochemical equations $(a), (b)$ and $(c)$, find out which of the algebric relationships given in options (i) to (iv) is correct.
(1) $C$ (graphite) $+ O _{2}( g ) \longrightarrow CO _{2}( g ) ; \Delta rH = x \,kJ\, mol ^{-1}$
(2) $C$ (graphite) $+\frac{1}{2} O _{2}( g ) \longrightarrow CO ( g ) ; \Delta rH = y\, kJ\, mol ^{-1}$
(3) $CO ( g )+\frac{1}{2} O _{2}( g ) \longrightarrow CO _{2}( g )$

NEETNEET 2013Thermodynamics

Solution:

Correct answer is (c) x = y + z