Answer:
The internal energy(ΔE) of a substance is calculated below:
From the first law of thermodynamics;
ΔE=q+w
Explanation:
<u>ΔE=q+w</u>
here;
+q=endothermic reaction
-q=exothermic reaction
+w=work done on the system
-w=work done by the system
Given:
q=+1.62kJ=1620J
w=-874J
To solve:
the internal energy(ΔE)
We know:
ΔE=q+w
<em>according to the problem;</em>
ΔE=q-w
since;
w=-874J (i.e.)work is done by the system.
ΔE=1620-874
ΔE=+746J
Therefore the internal energy is +746J
i.e. the option is "c"(+746J)
Answer:
(2) Student A scored 15 points higher than student B
Explanation:
Because they said 15 points higher instead of their grades are better (The same thing 4 does.
There are six atoms of oxygen in that compound.
Luster is your answer. Hope this helps.
-Belle
Answer:
<u>Covalent Bond:</u>
The bond formed by the sharing of electron pairs between atoms is called a covalent bond.
<u>For example:</u>
The bonds between H₂O are covalent bonds as they are formed as a result of sharing of electrons.
<u>Types:</u>
There are 5 types of covalent bond:
1) Single covalent bond
2) Double covalent bond
3) Triple covalent bond
4) Polar covalent bond
5) Non-polar covalent bond
Hope this helped!
<h3>~AH1807</h3>