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
lana [24]
3 years ago
13

How much heat is needed to change 47grams of water into ice

Chemistry
1 answer:
Elenna [48]3 years ago
3 0

the answer you are looking for is 4.22 kj.

You might be interested in
Enthalpy of combustion of ethyl alcohol, C2 H5 OH, is – 950 kJ mol–1. How much heat is evolved when one gram of ethyl alcohol bu
melomori [17]
<h3>Answer:</h3>

20.62 Kilo-joules

<h3>Explanation:</h3>
  • The Enthalpy of combustion of ethyl alcohol is -950 kJ/mol.
  • This means that 1 mole of ethyl alcohol evolves a quantity of heat of 950 Joules when burned.

Molar mass of ethyl ethanol = 46.08 g/mol

Therefore;

46.08 g of  C₂H₅OH evolves heat equivalent to 950 kilojoules

We can calculate the amount of heat evolved by 1 g of C₂H₅OH

Heat evolved by 1 g of C₂H₅OH  = Molar enthalpy of combustion ÷ Molar mass

                                      = 950 kJ/mol ÷ 46.08 g/mol

                                      = 20.62 Kj/g

Therefore, a gram of C₂H₅OH  will evolve 20.62 kilo-joules of heat

7 0
3 years ago
How much energy is required to raise the temperature of 3 kg of iron from 20° C to 25°C? Use the table below and this equation:
ElenaW [278]

The energy required to raise the temperature of 3 kg of iron from 20° C to 25°C is 6,750 J( Option B)

<u>Explanation:</u>

Given:

Specific Heat capacity of Iron= 0.450 J/ g °C

To Find:

Required Energy to raise the Temperature

Formula:

Amount of energy required is given by the formula,

Q = mC (ΔT)

Solution:

M = mass of the iron in g

So 3 kg = 3000 g

C = specific heat of iron = 0.450 J/ g °C [ from the given table]

ΔT = change in temperature = 25° C - 20°C = 5°C

Plugin the values, we will get,

Q = 3000 g ×  0.450 J/ g °C ×  5°C

 = 6,750 J

So the energy required is 6,750 J.

7 0
3 years ago
Read 2 more answers
What is true about the element calcium(Ca, atomic number 20)? Choose all that apply.
Marat540 [252]
It has 2 valence electrons

THANK ME
7 0
3 years ago
Read 2 more answers
What is the major water features of the tundra biome
jonny [76]
The two major water features of the tundra biome are nitrogen and phosphorus. Do you understand now?
6 0
3 years ago
The dopamine molecule has an intermediate hydrophobicity. Edit the dopamine molecule so that it is more hydrophobic.
yulyashka [42]
You should edit the dopamine molecule by tampering with its polar groups. Polar groups affect chemical's physical properties including hydrophobicity.
5 0
3 years ago
Other questions:
  • Are dogs considered organisms?
    5·2 answers
  • You have at your disposal 3 1-pound bags of various pure salts that dissolve readily in water. You can add one of the bags to a
    5·1 answer
  • The density of a 20.3 M CH 3OH (methanol) solution is 0.858 g/mL.
    10·1 answer
  • Read the given expression. X = number of protons − number of core electrons Which of the following explains the identity of X an
    15·1 answer
  • Help plz :)) &lt;3 i’m confused
    8·1 answer
  • Object A has 604 J of kinetic energy and 285 J of gravitational potential energy. Object B has 481 J of kinetic energy and 300 J
    11·2 answers
  • which of the following terms refers to areas of gas on the on the suns surface that are cooler than the gases around them
    8·1 answer
  • Sample with a density of 4.0g/cm^3 and 3.5g, find the volume
    6·1 answer
  • Which body systems help to exchange oxygen and carbon dioxide?
    12·1 answer
  • What is the reaction type<br> 2 Mgl2+ Mn(SO3)2 → 2 MgSO3 + Mnl4
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!