Fe\(_2\)O\(_{3(s)}\) + 2Al\(_{(s)}\) → Al\(_2\)O\(_3...
Fe\(_2\)O\(_{3(s)}\) + 2Al\(_{(s)}\) → Al\(_2\)O\(_3\) + 2Fe\(_{(s)}\). If the heats of formation of Al\(_2\)O\(_3\) and Fe\(_2\)O\(_3\) are - 1670 kJmol\(^{-1}\) and - 822 kJmol\(^{-1}\) respectively, the enthalpy change in kJ for the reaction is ?
+2492
+848
-848
-2492
Correct answer is C
Heat of formation = Heat of products - Heat of reactants
= - 1670 - (- 822)
= - 1670 + 822
= - 848 kJ
When chlorine is passed through a sample of water, the pH of the water sample would be ...
The principle of column chromatography is based on the ability of the constituents to ...
Equal volumes of CO2 cnd CO at s.t.p have the same...
Tin is unaffected by air at ordinary temperature due to its? ...
The metal extracted from cassiterite is ...
Elements with high ionization energies would------- ...
What is the chemical symbol for Lutetium? ...
The number of electrons presents in H+ is ...
The product of the reaction between C 2H5OH and concentrated H2SO 4 at 170oC is...