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notsponge [240]
3 years ago
14

In another universe the electrons are described by four quantum numbers p, q, r, and s. The rules for these quantum numbers are

as follows. • p = 1, 2, 3, 4, 5, ....; • q takes on positive odd integers and q ≤ p; • r takes on all even integer values from −q to +q; • s = ±1/2. (a) Sketch what the first four periods of the periodic table will look like in this universe. (b) What are the atomic numbers of the first four elements you would expect to be least reactive? (c) Give an example, using elements in the first four rows, of ionic compounds with the formulas, of ionic compounds with the formulas XY, XY2, X2Y, XY3, and X2Y3. (d) How many electrons can have p = 4, q = 3? (e) How many electrons can have p = 3, q = 0, r = 0? (f) How many electrons can have p = 6?
Chemistry
1 answer:
andreyandreev [35.5K]3 years ago
4 0

do u know how to start it and also define it

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xxTIMURxx [149]
<h3>The enthalpy of the reaction : C.226.73 kJ</h3><h3>Further explanation</h3>

Delta H reaction (ΔH) is the amount of heat change between the system and its environment

(ΔH) can be positive (endothermic = requires heat) or negative (exothermic = releasing heat)

The change in enthalpy in the formation of 1 mole of the elements is called enthalpy of formation

Delta H reaction (ΔH) is the difference between product enthalpy and reactant enthalpy (Hp-Hr)

Reaction :

2C + H2 -> C2H2

(ΔH) reaction = (ΔH) product - (ΔH) reactants

(ΔH) reaction = (ΔH) C2H2 - ((ΔH) C + (ΔH) H2)

for free element (ΔH) it has zero value, so (ΔH) C and (ΔH) H2 have zero value

From the available data: Hf (kJ / mol) C2 H2 (g)=  226.73

then

(ΔH) reaction = ΔH) C2H2 - ((ΔH) C + (ΔH) H2)

(ΔH) reaction = 226.73 - (0 + 0)

(ΔH) reaction = 226.73 (answer C)

<h3>Learn more</h3>

(ΔH) reaction

brainly.com/question/1889660

Keywords : (ΔH) reaction, C2H2

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