ΔHrxn of equation I = -123.5 kJ
<h3>Further explanation</h3>
Complete question :
Reaction 1 :
PCl₃ + Cl₂ → PCl₅
Reaction 2 :
P₄ + 6Cl₂ → 4PCl₃ ΔH = −1280 kj
Reaction 3 :
P₄ + 10Cl₂ → 4PCl₅ ΔH = −1774 kj
Based on the principle of Hess's Law, <em>the change in enthalpy of a reaction will be the same even though it is through several stages or ways </em>
Reverse reaction 2 :
4PCl₃ ⇒ P₄ + 6Cl₂ ΔH = +1280 kj (sign change)
Add to reaction 3 :
4PCl₃ ⇒ P₄ + 6Cl₂ ΔH = +1280 kj
P₄ + 10Cl₂ ⇒ 4PCl₅ ΔH = −1774 kj
-------------------------------------------------------- +
Canceled the same compound in the different side :
4PCl₃ + 4Cl₂ ⇒ 4PCl₅ ΔH = -494 kJ ⇒divide by 4
PCl₃ + Cl₂ ⇒ PCl₅ ΔH = -123.5 kJ
Answer:
Density= 1.7g/dm3
Explanation:
Applying
P×M= D×R×T
P= 2atm, Mm= 28, D=? R= 0.082, T= 400K
2×28= D×0.082×400
D= (2×28)/(0.082×400)
D= 1.7g/dm3
Answer:
Explanation:
Chemistry is the study of matter and the changes that matter undergoes. Matter is anything that has mass and takes up space.
Answer:
Explanation:
First, let's look at the Periodic Table.
We see that aluminum is a metal, while oxygen is a non-metal.
Now, let's recall three types of bonds
- Ionic: typically forms between a metal and a non-metal
- Covalent: usually forms between non-metals
- Metallic: tends to form with metals
Since we have a metal (Al) and a non-metal (O), aluminum oxide must have an <u>ionic bond.</u>
The tree's leaves absorb CO2 and make O2