MCQ
The heat evolved in the combustion of methane is given by the following equation

$C{H_4}(g) + 2{O_2}(g) \to C{O_2}(g) + 2{H_ {2}}O(l);$

$\Delta H =  - 890.3\,kJ$

How many grams of methane would be required to produce $445.15\, kJ$ of heat of combustion.....$g$

  • A
    $4$
  • $8$
  • C
    $12$
  • D
    $16$

Answer

Correct option: B.
$8$
b
$89.03 \,\mathrm{kJ}$ heat librate by $=1 \,\mathrm{mol}$

$1\, kJ$ heat librate by $=\frac{1}{890.3}$ $mol$

$445.15 \,\mathrm{kJ}$ heat liberate by $=\frac{445.15}{890.3} \,\mathrm{mol}$

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Similar questions

Equilibrium constants for the following reactions are given (pressure in atm) for the reactions at  $0\,^o C$. Select the option mentioning correct order of True $(T)$ or False $(F)$ statement

$A.6{H_2}{O_{\left( s \right)}} \rightleftharpoons A.2{H_2}{O_{(s)}} + \mathop {4{H_2}{O_{(g)}}};{{K_P} = 1.6 \times {{10}^{ - 11}}} $

$B.12{H_2}{O_{\left( s \right)}} \rightleftharpoons B.7{H_2}{O_{(s)}} + \mathop {5{H_2}{O_{(g)}}};{{K_P} = 2.43 \times {{10}^{ - 13}}} $

$B.10{H_2}{O_{\left( s \right)}} \rightleftharpoons {C_{(s)}} + \mathop {10{H_2}{O_{(g)}}};{{K_P} = {{10}^{ - 30}}} $

Aqueous tension of $H_2O$ at $0\,^oC$ is given as $0.76\  torr$

$(I)$ The most effective drying agent will be $C_{(s)}$. Out of $C_{(s)}$ , $B. 7H_2O_{(s)}$ & $A. 2H_2O_{(s)}$

$(II)$ At $0\,^oC$, $A.6H_2O_{(s)}$ & $B.12H_2O_{(s)}$ will

$(III)$ If $R.H$ is less than $100\%$ in a chamber at $0\,^oC$, then none of the substance can act as deliquescent

Who is given the credit for creation of first nuclear reactor.
Which of the order for ionisation energy is correct
The ratio of equivalent weights of $C_2H_5OH$ in the following reactions is

$(i) C_2H_5OH \longrightarrow CH_3CHO$

$(ii) C_2H_5OH \longrightarrow C_2H_5ONa$

Addition of cold conc. $\mathrm{H}_2 \mathrm{SO}_4$ with alkenes is an example of :
The energy required to dislodge electron from excited isolated H-atom, $I{E_1} = 13.6\,\,eV$ is
Arrange the following in increasing order of reactivity towards nitration

$A$.$p$-xylene  $B$.bromobenzene  $C$.mesitylene  $D$,nitrobenzene  $E$.benzene

Choose the correct answer from the options given below.

Which of the following is the wrong statement?
Increasing order of stability among the three main conformations (i.e. Eclipse, Anti, Gauche) of $2-$ fluoroethanol is
Isopropyl alcohol is obtained by reacting which of the following alkenes with conc. ${H_2}S{O_4}$ and ${H_2}O$