What is the standard enthalpy of formation of co(g). given: ah. [c] = -393 kj mol2. ah [co] = -283 kj mol2.

The standard enthalpy of formation of CO(g) is:

Δ

Explanation:

The chemical equation to formation of CO  is:

→

So, we need to find the standard enthalpy of formation of CO(g) with the expression:

ΔΣΔΣΔ(1)

With the information of the exercise we know:

AH [C] = -393 kJ mol2

AH [CO] = -283 kJ mol2

The enthalpy of formation of a pure compound is zero so the enthalpy of Oxygen is zero.

Now, we can replace this values in the equation (1)

Δ

Δ

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1. a)c-14 has two more protons

2. d)they have different numbers of protons, neutrons, and valence electrons; they are all gases at room temperature.

3. c) iron and nickel.