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
castortr0y [4]
3 years ago
8

Ethanol, CH.0, is common beverage alcohol. At its boiling point of 78.5 °C, the enthalpy of vaporization of ethanol is 38.6 kJ/m

ol. How much heat is required to vaporize 250 g of ethanol at 78.5 °C? Ans = 209.8 KJ
Chemistry
1 answer:
garik1379 [7]3 years ago
6 0

Answer:

209.8 kilo Joules heat is required to vaporize 250 g of ethanol at 78.5 °C.

Explanation:

Mass of an ethanol = 250 g

Molar mass of ethanol = 46 g/mol

Moles of an ethanol = n=\frac{250 g}{46 g/mol}=5.435 mol

Enthalpy of vaporization of ethanol = \Delta H_{vap} =38.6 kJ/mol

Heat required to vaporize 250 g of ethanol at 78.5 °C : Q

Q=n\times \Delta H_{vap}

=5.435 mol\times 38.6 kJ/mol=209.7826 kJ\approx 209.8kJ

Q = 209.8 kilo Joules

You might be interested in
6. How much energy is needed to freeze 88.0 g of silver?
Stella [2.4K]
7,040 energy to freeze the silver :)
8 0
2 years ago
Try moving an electron from the metal to the nonmetal. What happens?
skad [1K]

Answer:

Explanation:

When electron is transfer from metal to non metal anion and cations are formed and compound formed is called ionic compound.

Ionic bond:

It is the bond which is formed by the transfer of electron from metal to the atom of non metal.

Both bonded atoms have very large electronegativity difference. The atom with large electronegativity value accept the electron from other with smaller value of electronegativity thus the atom which accept the electron is form anion and metal atom which lose the electron is form cation .

For example:

Sodium chloride is ionic compound. The electronegativity of chlorine is 3.16 and for sodium is 0.93. There is large difference is present. That's why electron from sodium is transfer to the chlorine. Sodium becomes positive and chlorine becomes negative ion the compound form is called sodium chloride.

3 0
3 years ago
What are the main reasons that organic chemistry is a primarily target for "green chemistry"? I. Organic solvents are often flam
Debora [2.8K]

Answer: Option 1 and 11

1. Organic solvents are often flammable.

II. Organic solvents are often toxic.

Explanation:

Organic solvents are often flammable and Organic solvents are often toxic are the reasons why organic chemistry is a primary target of green chemistry because green chemistry is the use of principles or approach to remove hazardous or toxic substances from chemical.profuctd or processes to make them fit or safe for use and the solvents of organic chemist are toxic, therefore green chemistry remove the toxic substances.

8 0
3 years ago
Which of the following elements is an example of a metalloid?
8_murik_8 [283]
Sodium is an earth-metal (group one), sliver and platinum are d-block metals.... Thus silicon is the metalloid and that is true because it looks like a metal being shiny blue-gray but it exhibit non-metal characteristics, except the fact that it can conduct electricity in a heated state.
8 0
3 years ago
Read 2 more answers
Slow cooling of magma leads to the formation of large crystals, such as halite and calcite.
mihalych1998 [28]
False h they gg be DVD BBC do Ed C rhh h do B try egg cut of C the
4 0
2 years ago
Other questions:
  • How many grams of Ag2CO3 are required to reacr with 28.5 mL of 1.00 M NaOH solution?
    13·1 answer
  • If a Geiger counter that is 1 m away from a small source reads 50 counts per minute, what will its reading be 2 m from the sourc
    9·2 answers
  • Why are alkali metals more reactive than alkaline earth metals?
    15·1 answer
  • What Element is named for a country in western europe
    7·1 answer
  • When starch is broken down it becomes _________.
    8·2 answers
  • What holds atoms together in a molecule?
    9·2 answers
  • What factors could be used to increase reaction rate? Check all that apply.
    15·2 answers
  • How to make baking powder
    14·2 answers
  • Which level of organization is laWhich level of organization is largest?
    13·1 answer
  • In chemical reactions, a product is _______.
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!