When methane burns, 890.3 kJ mol -1 of energy is released. The calorific value for methane is kJ g -1.

Question

When methane burns, 890.3 kJ mol -1 of energy is released. The calorific value for methane is kJ g -1. (A)  (B)  (C)  (D)

Tardigrade Admin · Accepted Answer

The amount of heat produced in calorie or joule when one gram of a substance (food or fuel) is completely burnt or oxidised is known as calorific value.
For methane,

C H_{4 (g)} + 2 O_{2 (g)} ⟶ C O_{2 (g)} + 2 H_{2} O_{(l)};

Δ_{c} H = - 890.3 k J m o l^{- 1}

So, the calorific value of methane

= \frac{890.3}{16}

= 55.64 k J g^{- 1}

Q. When methane burns, 890.3kJmol−1 of energy is released. The calorific value for methane is______ kJg−1.

The amount of heat produced in calorie or joule when one gram of a substance (food or fuel) is completely burnt or oxidised is known as calorific value. For methane, CH4(g)​+2O2(g)​⟶CO2(g)​+2H2​O(l)​; Δc​H=−890.3kJmol−1 So, the calorific value of methane =16890.3​ =55.64kJg−1

Q. When methane burns, $890.3 k J m o l^{- 1}$ of energy is released. The calorific value for methane is______ $k J g^{- 1}$ .