the answer is 287cm is the volume
Answer: ΔH for the reaction is -277.4 kJ
Explanation:
The balanced chemical reaction is,
The expression for enthalpy change is,
where,
n = number of moles
Now put all the given values in this expression, we get
Therefore, the enthalpy change for this reaction is, -277.4 kJ
CH4 is the molecular formula for methane.
Exothermic reactions are chemical reactions that proceed with the release of heat energy. I contrast, endothermic reactions involve absorption of heat.
The enthalpy change (ΔH) for exothermic reactions is negative while that of endothermic reactions is positive.
In the given examples, reactions that show a negative ΔH are:
NH3 + HCl ------- NH4Cl ΔH = -176 KJ/mol
2Mg + O2 -------- 2MgO ΔH = -1203 kj/mol
C + O2 ---- CO2 ΔH = -393.5 kj/mol
CH4 + 2O2 ----------------- CO2 + 2H2O ΔH = -891 kj/mol