-503.7 kJ
-282.6 kJ
+282.6 kJ
+503.7 kJ
Correct answer is B
Energy change (ΔH) = 2ΔHCO2 - (2ΔHCO + ΔHO)
= 7x - 393 - (7 * 110.4 + 0)
= -393 + 110.4 = -282.6 kJ
Which of these is NOT a physical property f water? ...
The confirmatory test for alkanoic acids in organic qualitative analysis is the? ...
Trioxosulphate (lV) acid is not stored for a long period because it ...
When steam is passed over red hot carbon the substances produced are ...
Which of the following metals is passive to concentrated trioxonitrate (V) acid? ...
Which of the following is a example of a chemical change? ...
The ability of carbon to form long chains is referred to as ...
How many orbits are contained in an atom with atomic number 13? ...