Which of the following reactions will have the value of Δ S with a negative sign?

Question

Which of the following reactions will have the value of Δ S with a negative sign? (A) H2O(l) → H2O(g) (B) 2SO2(g) + O2(g) → 2SO3(g) (C) Cl2(g) → 2Cl(g) (D) CaCO3(s) → CaO(s) + CO2(g)

Tardigrade Admin · Accepted Answer

2SO2(g) + O2(g) → 2SO3(g) Δ ng = 2 - 3 = -1, Δ S = -ve

Q. Which of the following reactions will have the value of $Δ S$ with a negative sign?

$H_{2} O_{(l)} \to H_{2} O_{(g)}$

$2 S O_{2 (g)} + O_{2 (g)} \to 2 S O_{3 (g)}$

$C l_{2 (g)} \to 2 C l_{(g)}$

$C a C O_{3 (s)} \to C a O_{(s)} + C O_{2 (g)}$

$2 S O_{2 (g)} + O_{2 (g)} \to 2 S O_{3 (g)}$
$Δ n_{g} = 2 - 3 = - 1$ , $Δ S = - v e$

Q. Which of the following reactions will have the value of ΔS with a negative sign?

H2​O(l)​→H2​O(g)​

2SO2(g)​+O2(g)​→2SO3(g)​

Cl2(g)​→2Cl(g)​

CaCO3(s)​→CaO(s)​+CO2(g)​