The greatest positive enthalpy change has PCl₅(g) → P(g) + 5Cl(g)
An enthalpy change is difference between the enthalpy after the chemical reaction has completed.
An enthalpy change of phosphorus(V) chloride (PCl₅) molecule is energy needed for breaking up one molecule of phosphorus(V) chloride into one phosphorus and five chlorine atoms.
In a chemical reaction, chemical bonds are forming and breaking and this cause the transformation of one group of chemical substances to another.
Energy is needed to break chemical bonds in molecules (positive enthalpy change), while during formation of molecule, energy is released (negative enthalpy change)
The stronger are the bonds, more energy is needed and enthalpy change is more positive.
PCl₅ has more bonds to break than PCl₃.
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Answer:
is the first one
is the second one
Explanation:
The roman numeral indicates the charge on the cation (the positively charged ion in the ionic compound, almost always a metal). So manganese (II) acetate tells us there will be a charge of 2+ on the Mg. Gold (I) oxide has a charge of 1+ on the Au.
When a ionic compound is formed, the total charge of the compound (the sum of the postive and negative charges) must equal zero.
Acetate is a polyatomic ion with a charge of 1-. This means there will need to be two of them to balance out the charge on the manganese.
Oxygen, when ionized, has a charge of 2-. This means there will need to be two gold atoms to balance out the negative charges.
Answer:
1.83 atm
Explanation:
Total pressure is the sum of partial pressures, so the pressure of hydrogen and pressure of oxygen add to equal 4.53 atm
4.53 = 2.7 + Po
Po = 4.53 - 2.7 = 1.83 atm
Answer:
mgh is the formula for potential energy