1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
earnstyle [38]
4 years ago
7

which is carried out at constant pressure. The total ΔS for this process is known to be 75.0 J·K−1·mol−1. For A(l) and A(g), the

Cp values are 75.0 J·K−1·mol−1 and 29.0 J·K−1·mol−1, respectively, and are not dependent on temperature. Calculate ΔHvaporization for A(l) at 125°C (its boiling point).
Chemistry
1 answer:
Gnesinka [82]4 years ago
7 0

Answer:

ΔHv = 29861.25 J/mol

Explanation:

A(l) → A(g)

∴ P: at constant

∴ ΔS = 75.0 J/K.mol

∴ T = 125°C = 398.15 K

law's Trouton:

  • ΔS = ΔHv / T.....at T,P constant

⇒ ΔS = 75.0 J/mol.K = ΔHv / ( 398.15 K )

⇒ ΔHv = 75.0 J/mol.K * 398.15 K

⇒ ΔHv = 29861.25 J/mol

You might be interested in
What caused our solar system to form by pulling together gases and dust in a nebula?​
Furkat [3]
I’m pretty sure it’s gravity man
5 0
2 years ago
An object has a mass of 45.0 g and a volume of 4.0 ml. what is its density?
andreev551 [17]

Answer:

The answer is

<h2>11.25 g/mL</h2>

Explanation:

The density of a substance can be found by using the formula

Density =  \frac{mass}{volume}

From the question

mass = 45 g

volume = 4 mL

Substitute the values into the above formula and solve for the density

We have

Density =  \frac{45}{4}

We have the final answer as

<h3>11.25 g/mL</h3>

Hope this helps you

4 0
4 years ago
Please help.
mojhsa [17]

Explanation: An element is represented in the form of _{A}^{Z}\textrm{X} where,

X = Symbol of the element

A = Atomic Mass of the element X

Z = Atomic Number of element X

Hence, For the element Justwondoricium,

Symbol = Jw

Atomic number = 120

Atomic Mass = 224

Now, Atomic number = Number of electrons = Number of Protons

Number of electrons = 120

Number of Protons = 120

and Atomic Mass = Number of neutrons + Number of protons

Number of neutrons can be calculated as we know atomic mass and number of neutrons, Putting the numbers we get

Number of neutrons = 224 - 120 = 104

The nearest noble gas to the element having atomic number 120 is Oganesson (Og), which has an atomic number of 118, so the next two electrons will be filled in the 8s orbital.

Electronic Configuration of Jw is [Og]8s^2

This electronic configuration lets us know about the location of the element in periodic table.

As the electron is entering the 8th shell, it belongs to the 8th period and as the last electron enters the s-orbital, it belongs to the S-block of the periodic table.

When the s-electrons are 1, it belongs to Group 1.

When the s-electrons are 2, it belongs to Group 2.

As this element has 2 s-electrons, it belongs to the Group 2.

8 0
4 years ago
The “fatal flaw” in Rutherford’s model of the atom was the idea that if the electrons were ________.
Wittaler [7]
The correct option is A. Rutherford model of the atom consider an atom to be made up of a central nucleus with electrons orbiting around it. The nucleus is considered to be tiny, heavy and its positively charged while the electrons are negatively charged. The shortcoming of this model is that it was not able to explain how the positive nucleus was not able to attract the negative electrons and pull them inside the nucleus. 
8 0
4 years ago
Tin metal reacts with hydrogen fluoride to produce tin (ll )fluoride and hydrogen gas according to the balanced equation. Sn(s)+
ladessa [460]

Answer:

                      1.263 moles of HF

Explanation:

                     The balance chemical equation for given single replacement reaction is;

                                    Sn + 2 HF → SnF₂ + H₂

Step 1: <u>Calculate Moles of Tin as;</u>

As we know,

                    Moles  =  Mass / A.Mass    ----- (1)

Where;

           Mass of Tin  =  75.0 g

           A.Mass of Tin  =  118.71 g/mol

Putting values in eq. 1;

                    Moles  =  75.0 g / 118.71 g/mol

                    Moles  =  0.6318 moles of Sn

Step 2: <u>Find out moles of Hydrogen Fluoride as;</u>

According to balance chemical equation,

                     1 mole of Sn reacted with  =  2 moles of HF

So,

              0.6318 moles of Sn will react with  =  X moles of HF

Solving for X,

                     X =  0.6318 mol × 2 mol / 1 mol

                     X  =  1.263 moles of HF

8 0
3 years ago
Other questions:
  • 1. which is not a component of biodiversity
    11·1 answer
  • Mothballs are composed primarily of the hydrocarbon naphthalene (C10H8). When 1.025 g of naphthalene is burned in a bomb calorim
    13·1 answer
  • How can you improve the percent yield of copper in this lab? Check all possible strategies that will help you do so.
    12·2 answers
  • HELP ASAP
    9·1 answer
  • Solution of Na2SO4 is <br> A) acidic B) basic C neutral
    14·1 answer
  • Weather can change from day to day, but does not
    5·2 answers
  • DESPERATE WILL GIVE BRAINLIST AND THANKS
    14·1 answer
  • 0=4<br> Balance this equation<br> H₂sicl2+ H₂O → H8Si4O4 + HCl
    14·1 answer
  • Which formation is one feature of karst topography?
    14·2 answers
  • Chlorine and bromine are elements in Group VII.
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!