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
Anna11 [10]
3 years ago
15

When 3.0 kg of water is warmed from 10 °C to 80 °C, how much heat energy is needed?

Chemistry
1 answer:
Naddik [55]3 years ago
6 0

Answer:

THE HEAT NEEDED TO CHANGE 3KG OF WATER FROM 10 C TO 80 C IS 877.8kJ OR 877,800 J.

Explanation:

Mass = 3.0 kg = 3 * 1000 = 3000 g

Initial temperature = 10 C

Final temperature = 80 C

Change in temperature = 80 - 10 = 70 C

Specific heat of water = 4.18 J/g C

Heat needed = unknown

Heat is the amount of energy in joules needed to change a gram of water by 1 C.

Heat = mass * specific heat * change in temperature

Heat = 3000 g * 4.18 J/g C * 70 C

Heat = 877 800 Joules

Heat = 877.8 kJ.

The heat needed to change 3 kg mass of water from 10 C to 80 C is 877,800 J or 877.8 kJ.

You might be interested in
If the concentration of products is increased the equilibrium is shifted from * left to right/ to the left/ right to left /down
Marysya12 [62]

Answer:

to the left

Explanation:

<u>If the concentration of products is increased for a reaction that is in equilibrium, the equilibrium would shift to the left side of the reaction (the reactant's side). </u>

For a reaction that is in equilibrium, the reaction is balanced between the reactants and the products. According to Le Cha telier's  principle, if one of the constraints capable of influencing the rate of reactions is applied to such a reaction that is in equilibrium, the equilibrium would shift so as to neutralize the effects created by the constraint.

<em>Hence, in this case, if the concentration of the products of a reaction in equilibrium is increased, the equilibrium would shift in such a way that more reactants are formed so as to annul the effects created by the increase in the concentration of the products. Since reactants are always on the left side of chemical equations, it thus means that the equilibrium would shift to the left.</em>

5 0
2 years ago
Since both HBr and KOH are strong, we expect these reactions to occur fully. You mix 2 moles of HBr with 3 moles of KOH in enoug
AysviL [449]

Answer: pH = 14

Explanation: Please see the attachments below

8 0
3 years ago
Determine the rate of a reaction that follows the rate law rate = k a m b i where
ikadub [295]
(missing part of your question):
when we have K = 1 x 10^-2 and [A] = 2 M & [B] = 3M & m= 2 & i = 1
So when the rate = K[A]^m [B]^i
and when we have m + i = 3 so the order of this reaction is 3 So the unit of K is L^2.mol^-2S^-1
So by substitution:
∴ the rate = (1x 10 ^-2 L^-2.mol^-2S^-1)*(2 mol.L^-1)^2*(3mol.L^-1)
                 = 0.12 mol.L^-1.S^-1
6 0
3 years ago
Which factor determine the reactivity of alkyl halide
Pavel [41]

Answer:

This reactivity order reflects both the strength of the C–X bond, and the stability of X(–) as a leaving group, and leads to the general conclusion that alkyl iodides are the most reactive members of this functional class.

6 0
3 years ago
Determine the oxidation numbers of the elements in each compound of the following reaction. Determine what has been oxidized/red
PSYCHO15rus [73]

Answer:

<u>mnemonic</u><u> </u><u>isjdndbeudxhdnrhcurhrfkrr</u>

4 0
3 years ago
Other questions:
  • If the total number of H30+ ions are greater than the OH- the resulting solution will be?​
    7·1 answer
  • Suppose that you have a supply of a 40% solution of alcohol and a 60% solution of alcohol. how many quarts of each should be mix
    5·1 answer
  • A redox reaction has occurred ________.
    10·1 answer
  • What is the enthalpy for the reaction represented in the following energy diagram?
    6·1 answer
  • 22.What percent would be dominant? What percent would be recessive?
    9·2 answers
  • Consider the balanced chemical equation that follows. You are asked to determine how many moles of water you can produce from 4.
    6·1 answer
  • How many atoms are there in a molecule?
    6·1 answer
  • contrast copy and fill in this graphic organizer to contrast how different elements, isotopes, and ions are produced
    7·1 answer
  • Explain the difference, with sketches, between the titration curves of monoprotic acid and a triprotic acid.
    9·1 answer
  • when magnesium is burned in air the mass of the product is greater than the mass of the solid magnesium burned. A student claims
    11·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!