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
stiv31 [10]
3 years ago
6

A solar heating specialist is considering paraffin (Cp = 2.90 J/g O C) as a storage material for heat. How many kg of paraffin w

ould be needed to collect the amount of energy as 4.73 x 10 3 kg of water?
Chemistry
1 answer:
Stels [109]3 years ago
7 0

Answer:

Mass of paraffin that would be needed to collect the amount of energy as 4.73 x 10³ kg of water is 6.85 * 10³ kg

Explanation:

Specific heat capacity of paraffin, Cp = 2.90 J/g.°C = 2900 J/kg.°C

Specific heat capacity of water = 4.20 J/g.°C = 4200 J/kg.°C

Amount of heat energy that can be stored by 4.73 * 10³ kg of water heated through a degree rise in temperature can be calculated as below:

Using  H = mCpθ where m is mass of substance, Cp is specific heat capacity and θ is temperature change

H = 4.73 * 10³ kg * 4200 J/kg.°C * 1°C

H = 19866000 J

Mass of paraffin that would be needed to collect the amount of energy as 4.73 x 10 3 kg of water for a degree rise in temperature is calculated as follows:

H = mCpθ

19866000J = m * 2900 J/kg.°C * 1°C

m = 19866000J / 2900 J/kg

m = 6850.34 kg = 6.85 * 10³ kg

Therefore, mass of paraffin that would be needed to collect the amount of energy as 4.73 x 10³ kg of water is 6.85 * 10³ kg

You might be interested in
(55 points) Please help me with my homework please please help me thanks so much
balandron [24]

Answer:

I didn't do the observation so I can't help sorry

8 0
2 years ago
How is light energy converted to chemical energy?
ipn [44]

Answer:

Photosynthesis is the process in which light energy is converted to chemical energy in the form of sugars. In a process driven by light energy, glucose molecules (or other sugars) are constructed from water and carbon dioxide, and oxygen is released as a byproduct.

Explanation:

3 0
2 years ago
Read 2 more answers
How many grams of aluminum metal can be produced when 50.0 grams of aluminum chloride decompose? 2AlCl3 → 2Al + 3Cl2
Arisa [49]

Answer:

10.1 g of Al are formed

Explanation:

The reaction is:

2AlCl3 --> 2Al + 3Cl2

So 2 moles of aluminun chloride decompose into 2 moles of Al and 3 moles of chlorine.

Ratio is 2:2.

Let's convert the mass of salt into moles (mass / molar mass)

50 g / 133.34 g/mol = 0.374 moles.

As the ratio is 2: 2, if I have 0.374 moles of salt, I would produce the same amount of Al, just 0.374.

Let's convert the moles to mass

(Mol . molar mass)

0.374 mol . 26.98 g / mol = 10.1 g of Al are formed

Ξ

7 0
3 years ago
Fill in the blanks....
sveta [45]
Iron 1 chlorine 3 for number what I suggest you do is look at the periodic table online and then look at the numbers and see how many are there
3 0
3 years ago
Please help me answer this question
NemiM [27]

Answer:

d=m/v d=0.94

Explanation:

^^^^^^&&&&^^^^

7 0
3 years ago
Other questions:
  • Determine the vapor pressure (atm) of rubbing alcohol (isopropanol) at 20.0 °C. The normal boiling point of isopropanol is 82.3
    8·1 answer
  • A sample of gas (1.9 mol) is in a flask at 21 °C and 697 mm Hg. The flask is opened and more gas is added to the flask. The new
    7·1 answer
  • Your favorite beach has 42 large sand dunes throughout the course of the year wind erosion destroys eight sand dunes and create
    11·1 answer
  • What kind of bond is formed when lithium and fluorine combine to form lithium fluoride?
    5·2 answers
  • The diagram shows a ball resting at the top of a hill. A ball is at the top of a slope at point X. The bottom of the slope is po
    13·2 answers
  • Which type of energy depends on the distance between two particles and the charge of each particle? A. Electrical potential ener
    11·1 answer
  • Determine which change of state is being described in this passage.
    9·2 answers
  • 3
    5·1 answer
  • Two groups were tasked to measure the mass of the metal objects given by their teacher. Rachel’s group has the following data fo
    9·1 answer
  • 76.5 scientific notation
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!