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
77julia77 [94]
4 years ago
5

How many grams of c2h5oh must be burned to raise the temperature of 400.0 ml of water from 20.0 ∘c to 100.0 ∘c? (the specific he

at of water is 1.00 cal/g⋅∘c or 4.184 j/(g⋅∘c)?
Chemistry
1 answer:
Lana71 [14]4 years ago
7 0
From tables, the heat of combustion of ethanol (C₂H₅OH) is 29.7 kJ/g.

Given:
V = 400 mL of water
ΔT = 100 - 20 = 80°C, temperature rise
c = 1.00 cal/(g-°C), specific heat of water = 4.184 J/(g-°C)

Because the density of water is approximately 1.0 g/mL. the mass of water is
m = 400 g.

Let x = grams of ethanol that should be burned to make the water rise
by 80 °C.
Then
(29.7 x 10³ J/g)*(x g) = (400 g)*(4.184 J/g-°C))*(80 °C)
29.7 x 10³x = 1.339 x 10⁵
x = 4.5 g

Answer: 4.5 grams
You might be interested in
An example of a heterogeneous mixture is
zaharov [31]

An example of the mixture is oil and water.
8 0
3 years ago
Sound travels most quickly through solids because _____. solids have greater frequencies the molecules in solids are very close
uranmaximum [27]
Sound travels most quickly through solids because _____.

answer is: because solids r the most sense.

The distance between molecules in solids r very small.Because they are so close, they can collide very quickly, i.e. it takes less time for a molecule of the solid to 'bump' into its neighbor. Solids are packed together tighter than liquids and gases, hence sound travels fastest in solids.

7 0
3 years ago
Read 2 more answers
Can someone please help me with this!!!<br><br> ( I chose to stop using water bottles )
Dafna1 [17]

Answer:

Flushing goldfish down the toliet

Explanation:

This would help the planet because goldfish are a very evasive species that has been harming our natural enviroments lakes and rivers. Ever since people have been flushing them down the toliet including me since I've had over six they have been finding their ways into our ecosytem and damaging nature. You may think that goldfish are a cute and small pet species to keep in a fish tank but the fish can grow in the right conditons up to 16.1 inches long and can top over five pounds in the wild. Unfortunately most goldfish never thrive like this in fish tanks due to nasty inadequate housing and feeding conditions. And most do not live up to their expected life span in the wild of 15 to even thirty years due to their living conditons. Did you know, goldfish will actually jump out of their tank in a final desperate search for better living conditions and enviroment to live in to meet their physiological needs. But lets get back to the problem so don't be to quick to feel sorry for them, when people flush them down the toliet they repopulate somehow in our lakes and rivers. Even through, it is not clear how they got there, which the suspected culprit is the sewer system. They threaten the natural enviroment tho because they are obnivores and they eat a mixtures of plants and animal specimen. You are probrably thinking why is this a problem, well its because goldfish are particullary greedy eaters and will eat, eat, and feast on the natural envrioment they infestated. And the waste they leave on the enviroment will promote the growth of algae which could cause an extent of enviromental damage. Of course goldfish are not impacted by this algae growth for adaptation reasons which shield them. This is not the main problem tho the main problem of this is that female goldfish can produce up to 1000 eggs at a time. And to make things worse unlike other fish species where the parents of the eggs leave the eggs for predaetors and well the elements of nature the goldfish instead guard their nest foriciously from predaetors that eat fish eggs in which effectively shields the populations young from danger. And to just add to the chaos the goldfish sadly have no real natural predaetor in the unitedstates which just causes more problems since they have no one killing them. And did I mention that they could live up to a real possibility of thirty years. And that they are forocious eaters that could eat a variety of types of foods. All of these facts in the end lead to two things first stop flushing your pet goldfish down the toliet and secondly now you know how golfish impact our planet.

Give brainliest please it took me over thirty minutes of thinking!

4 0
3 years ago
Among K, Ca and Ba, which element possess low ionization energy?
deff fn [24]

Among the elements Barium has the lowest Ionization Energy.

<h3>What is Ionization Process ?</h3>

The process by which any neutral atom gets converted into electrically charged by gaining or losing electron is called Ionization Process.

K  is an alkali metal  it has to lose one electron to attain stable electronic configuration of an inert gas

For removing second electron , a stable configuration has to be broken and so will require high amount of energy.

Ca and Ba are alkaline earth metals.

They both have to lose 2 electrons to attain  stable electronic configuration of noble gas.

They have low Iow Ionization Energy as compared to K.

Ca has higher  Ionization Energy as compared to Ba because when we move down the periodic table , The ionization energy decreases.

Hence , Among the elements Barium has the lowest Ionization Energy.

To know more about Ionization Process

brainly.com/question/6638422

#SPJ1

5 0
2 years ago
The number of moles of<br> 480 dm3 of He
Mumz [18]

Answer:

286

Explanation:

see ur periodic table

7 0
3 years ago
Other questions:
  • What are some applications of the field of spectroscopy?
    13·2 answers
  • The specific heat for liquid ethanol is 2.46 J/(g•°C) when 655j are addedto a sample of ethanol temp rises from 18.2 to 32.8 wha
    12·1 answer
  • Why should scietist as questions
    13·1 answer
  • How many moles are in 68.5g of KOH?
    13·2 answers
  • Which organelle helps to break down substances?
    12·1 answer
  • Fill in the blank. (Copper has a charge of 2+)<br> Cu+ AgNO3 → Ag +
    5·2 answers
  • 2.In a titration, 25.00 cm3 of a solution of hydrochloric acid reacted with 18.40 cm3 of sodium hydroxide solution of concentrat
    11·1 answer
  • How many atoms are there in molecule of glucose (CH12O6)
    7·2 answers
  • Срочноооооооооооооо!!!!
    7·1 answer
  • True or false A(n) rift valley forms where plates diverge on land.
    6·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!