Use the equations in the table to calculate the enthalpy for the reaction: C(s) + 2 H2(g) → CH4(g)

Reaction ∆H° (kJ/mol)
C(s) + O2(g) → CO2(g) -393.5
H2(g) + 1/2 O2(g) → H2O(g) -285.8
CH4(g) + 2 O2(g) →
CO2(g) + 2H2O(l) -890.4

The answer is either
211.1 Kj/mol
890.4 kJ/mol
-1855.5kJ/mol
-1569.7kJ/mol
-1569.7kJ/mol
-74.7 kJ/mol

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Explanation:

b..

is the correct one

explanation:

covalent bonds form as valence electrons are shared between two atoms. lewis structures and structural formulas are common ways of showing the covalent bonding in organic molecules. formal charge describes the changes in the number of valence electrons as an atom becomes bonded into a molecule.

so here we go

atomic mass

239 + 1 = y + 134 + 3 combine like terms

240 = y + 137             subtract 137 from both terms

240 - 137 = y

103 = y

atomic number

94 = z +54 + 0

94 = z + 54               subtract 54 from both sides.

40 = z

answer