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Thermodynamics question

2019 · 12 Jan · Shift 2 · Q14
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Thermodynamics question

2019 · 12 Jan · Shift 2 · Q14

JEE MainChemistryThermodynamicsMCQ+4 / −1
Given (i) C (graphite) + O2O_2O2​(g) →\to→ CO2CO_2CO2​(g); Δ\DeltaΔ rH Θ^\ThetaΘ = x kJ mol −-− 1 (ii) C(graphite) + 12{1 \over 2}21​ O2O_2O2​(g) →\to→ COCOCO(g); Δ\DeltaΔ rH Θ^\ThetaΘ = y kJ mol −-− 1 (iii) COCOCO(g) + 12{1 \over 2}21​ O2O_2O2​(g) →\to→ CO2CO_2CO2​(g); Δ\DeltaΔ rH Θ^\ThetaΘ = z kJ mol −-− 1 Based on the above thermochemical equations, find out which one of the following algebraic relationships is correct?
  1. A
    z = x + y
  2. B
    x = y + z
  3. C
    x = y – z
  4. D
    y = 2z – x
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