The reaction in which Δ H Δ U is

Question

The reaction in which Δ H > Δ U is (A) N2(g) + 3H2(g) → 2NH3(g) (B) CH4(g) + 2O2(g) → CO2(g) + 2H2O(l) (C) N2(g) + O2(g) → 2NO(g) (D) CaCO3(S) → CaO(S) + CO2(g)

Tardigrade Admin · Accepted Answer

CaCo3(s) → CaO(s)+Co2(g) Δ n=+1 Δ H=Δ U+Δ ngRT Δ H> Δ U

Q. The reaction in which $Δ H > Δ U$ is

$N_{2 (g)} + 3 H_{2 (g)} \to 2 N H_{3 (g)}$

$C H_{4 (g)} + 2 O_{2 (g)} \to C O_{2 (g)} + 2 H_{2} O_{(l)}$

$N_{2 (g)} + O_{2 (g)} \to 2 N O_{(g)}$

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

$C a C o_{3 (s)} \to C a O_{(s)} + C o_{2 (g)}$
$Δ n = + 1$
$Δ H = Δ U + Δ n_{g} RT$
$Δ H > Δ U$

Q. The reaction in which ΔH>ΔU is

N2(g)​+3H2(g)​→2NH3(g)​

CH4(g)​+2O2(g)​→CO2(g)​+2H2​O(l)​

N2(g)​+O2(g)​→2NO(g)​

CaCO3(S)​→CaO(S)​+CO2(g)​