In which of the following reactions, the heat liberated is known as "heat of combustion"?

Question

In which of the following reactions, the heat liberated is known as "heat of combustion"? (A)  H+(aq)+OH-(aq)→ H2O(l)+ text heat (B)  C text(graphite)+(1/2)O2(g)→ CO(g)+ textheat  (C)  CH4(g)+2O2(g)→ CO2(g)+2H2O(l)+ textheat  (D)  H2SO4(aq)+H2O(l)→ H2SO4(aq)+ textheat

Tardigrade Admin · Accepted Answer

The amount of heat evolved or absorbed when 1 mole of the substance is completely oxidised is called heat of combustion. For example, CH4(g)+2O2(g)→ CO2(g)+2H2O(l)+ textheat

Q. In which of the following reactions, the heat liberated is known as "heat of combustion"?

$H^{+} (a q) + O H^{-} (a q) \to H_{2} O (l) + heat$

$C (graphite) + \frac{1}{2} O_{2} (g) \to CO (g) + heat$

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

$H_{2} S O_{4} (a q) + H_{2} O (l) \to H_{2} S O_{4} (a q) + heat$

The amount of heat evolved or absorbed when $1$ mole of the substance is completely oxidised is called heat of combustion. For example,
$C H_{4} (g) + 2 O_{2} (g) \to C O_{2} (g) + 2 H_{2} O (l) + heat$

Q. In which of the following reactions, the heat liberated is known as "heat of combustion"?

H+(aq)+OH−(aq)→H2​O(l)+ heat

C(graphite)+21​O2​(g)→CO(g)+heat

CH4​(g)+2O2​(g)→CO2​(g)+2H2​O(l)+heat

H2​SO4​(aq)+H2​O(l)→H2​SO4​(aq)+heat

The amount of heat evolved or absorbed when 1 mole of the substance is completely oxidised is called heat of combustion. For example, CH4​(g)+2O2​(g)→CO2​(g)+2H2​O(l)+heat

$H^{+} (a q) + O H^{-} (a q) \to H_{2} O (l) + heat$

$C (graphite) + \frac{1}{2} O_{2} (g) \to CO (g) + heat$

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

$H_{2} S O_{4} (a q) + H_{2} O (l) \to H_{2} S O_{4} (a q) + heat$

The amount of heat evolved or absorbed when $1$ mole of the substance is completely oxidised is called heat of combustion. For example,
$C H_{4} (g) + 2 O_{2} (g) \to C O_{2} (g) + 2 H_{2} O (l) + heat$