The enthalpy change, ΔH, for a reaction at constant pressure is defined as: ΔH = ΔE + PΔV. For which of the following reactions will ΔH be approximately equal to ΔE? Select all that apply. Group of answer choices 2 NO2(g) -> N2(g) + 2 O2(g)

The given question is incomplete. The complete question is:

The enthalpy change, ΔH, for a reaction at constant pressure is defined as: ΔH = ΔE + PΔV. For which of the following reactions will ΔH be approximately equal to ΔE? Select all that apply. Group of answer choices

None of the above

Explanation:

Relation of  with  is given by the formula:

    as

Where,

= enthalpy change

= internal energy change

R = Gas constant

T = temperature

= change in number of moles of gas particles =

1. For

2. For

3.  

Thus for reactions 2 and 3,  ΔH be approximately equal to ΔE

periodic trends is an atom that gets larger as the number of electronic shells increase, the radius of atoms increases as you go down a certain group in the periodic table of elements. in general, the size of an atom will decrease as you move from left to right of a certain period.

a electronegativity decreases beacuse the size of nucleus is bigger.