Answer:
Pushing the plunger reduces the volume and forces particles closer together. The particles inside the bubble are pushed into a smaller volume, so the plastic surrounding them gets smaller (crumples) to surround the smaller volume. 2.
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Mass of Zn = 0.103 g
Volume of HCl (V) = 50.0 ml
Density of solution (D) = 1.00 g/ml
Mass of HCl = D*V = 1.00 g/ml * 50.0 ml = 50.0 g
initial temp T1 = 22.5 C
Final temp T2 = 23.7 C
specific heat c = 4.18 J/g C
The heat (Q) required to raise the temp is given as:
Q = mcΔT = mc(T2-T1)
= (0.103+50)g * 4.18 J/g C * (23.7-22.5) C = 251.3 J = 0.2513 kJ
To find ΔH in kJ/mol
# moles of Zn = mass of Zn/Atomic mass = 0.103/65.39 = 0.00158 moles
a) ΔH = 0.2513 kJ/0.00158 moles = 159.05 kJ/mol
b) A calorimeter is an isolated system where there is no exchange of heat/energy.
Work done is given as: W = PΔV
since ΔV = 0, as the volume remains constant
W = 0
1) favor reverse
2) favor reverse
3) favor forward
4) favor forward
5) favor reverse
I believe these are right
Answer:
Nonmetals with nonmetals, because their difference in electronegativity is below 1.7.
Explanation:
Covalent bond is the bond which is formed with the sharing of the electrons between the two atoms which are taking part in the bond. It is generally formed between the atoms with similar electronegativity values.
It is the bond which is generally occurs within non metals as they share electrons to complete their octet.
The difference in the electronegativity values of the atoms involving in a covalent bond must not exceed the value of 1.7 .
<u>Correct answer:- Nonmetals with nonmetals, because their difference in electronegativity is below 1.7.</u>
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