Methane (ch4) reacts with cl2 to yield ccl4 and hcl by the following reaction equation: ch4 + 4 cl2 → ccl4 + 4hcl. what is the δh of the reaction if 51.3 g of ch4 reacts with excess cl2 to yield 1387.6 kj?

The ΔH of the reaction if 51.3 g of reacts with excess to yield 1387.6 kJ is 432.27kJ

Explanation:

To calculate the moles, we use the equation:

moles of

As is present in excess, is the limiting reagent as it limits the formation of product.

If 3.21 moles of methane releases heat = 1387.6 kJ

Thus 1 mole of methane release=

"among the transition metal elements, manganese and zinc have a slight lowering of electronegativities. the reason behind this is that the nuclear charges of these elements are slightly weaker than the other transition metal elements due to the way their valence electrons are filled up. both manganese and zinc have their valence electrons filled up to the 4th shell with 1 pair of electrons (4s2) completely occupying it. although the electrons in the 3rd shell (3d) are yet to be paired since the outer most shell is filled up, the ability of the nucleus to attract electrons is lessened. hence,   the electronegativity (or the ability to attract electrons) is lessened."