1. Tardigrade
  2. Question
  3. Chemistry
  4. If S+O2 arrow SO2;ΔH=-298.2kJmol- 1 SO2+1/2O2 arrow SO3;ΔH=-98.7kJmol- 1 SO3+H2O arrow H2SO4;ΔH=-130.2kJmol- 1 H2+1/2O2 arrow H2O;ΔH=-287.3kJmol- 1 Then the enthalpy of formation of H2SO4 at 298K is-

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Q. If $S+O_{2} \rightarrow SO_{2};ΔH=-298.2kJmol^{- 1}$
$SO_{2}+1/2O_{2} \rightarrow SO_{3};ΔH=-98.7kJmol^{- 1}$
$SO_{3}+H_{2}O \rightarrow H_{2}SO_{4};ΔH=-130.2kJmol^{- 1}$
$H_{2}+1/2O_{2} \rightarrow H_{2}O;ΔH=-287.3kJmol^{- 1}$
Then the enthalpy of formation of $H_{2}SO_{4}$ at $298K$ is-

NTA AbhyasNTA Abhyas 2020

Solution:

$ΔH=ΔH_{1}+ΔH_{2}+ΔH_{3}+ΔH_{4}$