Answer:
286 J/K
Explanation:
The molar Gibbs free energy for the vaporization (ΔGvap) is:
ΔGvap = ΔHvap - T.ΔSvap
where,
ΔHvap: molar enthalpy of vaporization
T: absolute temperature
ΔSvap: molar entropy of the vaporization
When T = Tb = 64.7 °C = 337.9 K, the reaction is at equilibrium and ΔGvap = 0.
ΔHvap - Tb . ΔSvap = 0
ΔSvap = ΔHvap/Tb = (71.8 × 10³ J/K.mol)/ 337.9 K = 212 J/K.mol
When 1.35 mol of methanol vaporizes, the change in the entropy is:
Let's first define the states of matter. There are three states: solid, liquid, and gas. To differentiate between them we can take water as an example. In its solid state it would be ice, it has a definite shape. The liquid state would be the normal water that we drink, and it takes the shape of the container in which it is contained. The gaseous state would be the water vapor that is generated when we heat it, it has a larger volume and is dispersed in the environment.
Having clarified the states of matter, let us now define a mixture. A mixture is the combination of two or more substances. When the substances have the same state of matter and there is no difference between them is called homogeneous mixture, when you can differentiate one substance from another will be a heterogeneous substance.
To solve the question you can for example see the mixture of breakfast cereal with milk. We have two substances, milk in liquid state and cereal in solid state, we can differentiate between these two substances so we have a heterogeneous mixture.
Answer: below
Explanation:
Glass can be heated up and turn into a liquid, its a hard procces, due to the extreme heat, machines are used today.
Answer:
Explanation:
β decay is a process in which a nucleus emits an electron.
The nuclear symbol for a β particle is
l
0
-1
e
.
In any nuclear equation, the sum of the subscripts (atomic numbers,
Z
) and the sum of the superscripts (atomic masses,
M
) must be equal on each side of the equation.
For the β decay of iodine 131, we have
131
53
I
→
l
M
Z
X
+
l
0
-1
e
Hence
131
=
M
+
0
, so
M
=
131
53
=
Z - 1
, so
Z
=
53
+
1
=
54
The element
X
with
Z = 54
is
Xe
.
So the equation is
131
53
I
→
131
54
Xe
+
l
0
-1
e
Note that in β decay, the product has the same mass number but an atomic number that has increased by 1.
The 5 rotational levels would there be between the ground vibrational state and the first excited vibrational state.
What is rotational levels?
The three major moments of inertia IA, IB, and IC determine the rotational energy levels for a nonlinear molecule. They revolve around three axes that are mutually orthogonal to one another and have their origin (or intersection) at the molecule's Centre of mass.
What is vibrational state?
The rotation of the molecule brought on by various vibrations in perpendicular planes is described by (123) or (12l23), where 0 l2 2 is an angular momentum quantum number.
Therefore , 5 rotational levels would there be between the ground vibrational state and the first excited vibrational state.
Learn more about rotational levels from the given link.
brainly.com/question/22283462
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