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
Alex Ar [27]
3 years ago
5

A 31.1 g wafer of pure gold, initially at 69.3 _c, is submerged into 64.2 g of water at 27.8 _c in an insulated container. what

is the final temperature of both substances at thermal equilibrium?
Chemistry
2 answers:
wel3 years ago
4 0
<span>The final temperature of both substances at thermal equilibrium is 28.4 degrees Celsius.</span>
KIM [24]3 years ago
3 0
Given:
Ma = 31.1 g, the mass of gold
Ta = 69.3 °C, the initial temperature of gold
Mw = 64.2 g, the mass of water
Tw = 27.8 °C, the initial temperature of water 

Because the container is insulated, no heat is lost to the surroundings.
Let T °C be the final temperature.

From tables, obtain
Ca = 0.129 J/(g-°C), the specific heat of gold
Cw = 4.18 J/(g-°C), the specific heat of water

At equilibrium, heat lost by the gold - heat gained by the water.
Heat lost by the gold is
Qa = Ma*Ca*(T - Ta)
      = (31.1 g)*(0.129 J/(g-°C)(*(69.3 - T °C)- 
      = 4.0119(69.3 - T) j
Heat gained by the water is
Qw = Mw*Cw*(T-Tw)
       = (64.2 g)*(4.18 J/(g-°C))*(T - 27.8 °C)
       = 268.356(T - 27.8)

Equate Qa and Qw.
268.356(T - 27.8) = 4.0119(69.3 - T)
272.3679T = 7738.32
T = 28.41 °C

Answer: 28.4 °C

You might be interested in
What does "hidden phenomena" mean in science?
dusya [7]

Answer:

it's means two plural phenomenon and object or aspect known for through the sentence rather than by dot or intuition a temporal or spout temporal object of sensory experience as discussion from a nominal

6 0
3 years ago
What is the overall charge of an ion Pat has 12 protons 10 electrons and 14 neutrons
Sav [38]

Answer:

The over all charge on atom will be +2.

Explanation:

An atom consist of electron, protons and neutrons. Protons and neutrons are present with in nucleus while the electrons are present out side the nucleus.

All these three subatomic particles construct an atom. A neutral atom have equal number of proton and electron. In other words we can say that negative and positive charges are equal in magnitude and cancel the each other. For example if neutral atom has 6 protons than it must have 6 electrons. The sum of neutrons and protons is the mass number of an atom while the number of protons are number of electrons is the atomic number of an atom.

For example

X is the element having 12 protons  10 electrons and 14 neutrons.

The number of protons and electrons are not equal which means two electrons are lose by the given atom and it is present in the form of cation.

The over all charge on atom will be +2.

4 0
3 years ago
Which of the following statements is true?
Zolol [24]

The statement that is true among the following sentences is ‘Minerals can be elements or compounds’. Minerals cannot be liquid in form and they are not organic. Minerals are inorganic and present as solid in phase. When placed in water, they do not dissolve at all.

8 0
3 years ago
Read 2 more answers
If I have a molar concentration of Na2S2O3 of .02M and a volume of .001L. As well as a Molar Concentration of KI .3M and H2O2 of
Aleonysh [2.5K]
You have to use everything that is given since you have to know which is the limiting reactant. We find the limiting reactant by calculating the number of moles of each reactant and compare the number of moles. The limiting reactant would be the one that is consumed fully by the reaction.


4 0
3 years ago
Isotopes of an element have the same number of ________ and different numbers of ________. neutrons... protons protons... neutro
Ivahew [28]
Protons . . . neutrons
8 0
3 years ago
Other questions:
  • According to the law of conservation of matter, the number of ________ is not changed by a chemical reaction.
    9·2 answers
  • The most common shape for a galaxy is ______.
    5·1 answer
  • Which of the following elements would you expect to be
    11·1 answer
  • What is room temperature in kelvins
    11·2 answers
  • Put the elements in order from the highest electronegativity at the top of your list, to the lowest at the bottom. Germanium (Ge
    6·1 answer
  • How many grams of water can be produced when 68 L of oxygen gas react
    7·2 answers
  • What types of chemical reactions are needed to make the perfect s'more?
    13·1 answer
  • Carbon disulfide is prepared industrially by reacting carbon with sulfur dioxide according to the above equation. If 70.8 g of c
    9·1 answer
  • Please do question 9 and 10
    10·1 answer
  • How many grams of ferric oxide will you need to make 1.5 M solution?
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!