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
Mars2501 [29]
2 years ago
12

The specific heat capacity of silver is 0.24 J/°C ·g.

Chemistry
1 answer:
kirza4 [7]2 years ago
6 0

Answer:

A) 900 J

B) 27.96 J

C) 1,628 J ≅ 1.63 kJ

Explanation:

The heat absorbed by the metal (silver) - or energy required to heat it -  is calculated as:

heat = mass x Cp x ΔT

Where Cp is the heat capacity (0.24 J/°C ·g) and ΔT is the change in temperature (final T - initial T).

A) Given:

mass = 150.0 g

final T = 298 K = 25°C

initial T = 273 K = 0°C

We calculate the energy in J to raise the temperature:

heat = mass x Cp x (final T - initial T)

       = 150 .0 g x 0.24 J/°C ·g x (25°C - 0°C )

       = 900 J

B) Given:

moles Ag= 1.0 mol

ΔT = 1.08°C

We first calculate the mass of silver (Ag) by multiplying the moles of Ag by the molar mass of Ag (MM = 107.9 g/mol)

mass = moles x MM = 1.0 mol Ag x 107.9 g/mol Ag = 107.9 g

Then, we calculate the heat required:

heat = mass x Cp x ΔT = 107.9 g x 0.24 J/°C ·g x 1.08°C = 27.96 J

C) Given:

heat = 1.25 kJ = 1,250 J

final T = 15.28°C

initial T = 12.08°C

We first calculate the change in temperature:

ΔT = final T - initial T = 15.28°C - 12.08°C = 3.2°C

Then, we calculate the mass of silver:

mass = heat/(Cp x ΔT) = 1,250 J/(0.24 J/°C ·g x 3.2°C) = 1,628 J ≅ 1.63 kJ

You might be interested in
How many electrons does a single hydrogen gain or lose in the following reaction? H 2 + O 2 → H 2 O
wariber [46]

Answer:

  • <u>option </u><u><em>B. Lose 1.</em></u>

Explanation:

To determine the number of<em> electrons that a single hydrogen gains or loses </em>you need to realize that the chemical reaction is an oxidation-reduction (redox) reaction and state the changes in the oxidation states.

The substance that gains electrons is being reduced, reducing its oxidation number, and the substance that lose electrons is being oxidized, increasing its oxidation state.

<u>1) State the oxidation state of hydrogen atoms in the rectant side:</u>

  • H₂: the oxidation state of any element in its atomic or molecular form is zero. That is indicated as a superscript to the right of the chemical symbol: H₂⁰

<u>2) State the oxidation state of the hydrogen atoms in the product side:</u>

  • H₂O: the rule says that the oxidation state of oxygen, when combined with other elements, except in the case of peroxides, is  -2.

        Hence, in order to the molecule H₂O be neutral, the total charge contributed by the two atoms of hydrogen must be + 2: +2 - 2 = 0.

        Since there are two hydrogen atoms, each contributes +2 / 2 = +1 charge.

<u>3) Conclusion:</u>

Every atom of hydrogen changes from a 0 oxidation number to a +1 oxidation number, which, in turn, means that every hydrogen atom loses one electron.

Thus, the answer is, the option <em>B. Lose 1.</em>

3 0
3 years ago
Read 2 more answers
Generally, does the size of a radioactive sample affect half-life?
Natasha2012 [34]

Answer:

The quantity of radioactive nuclei at any given time will decrease to half as much in one half-life.

Explanation:

4 0
2 years ago
Read 2 more answers
What type of radiation is carbon emitting in the following equation? 14/6C=&gt;0/-1e+14/7N
Lyrx [107]
I believe the answer is gamma ray.
7 0
3 years ago
What is a common property of metals? a) insulates from electricity b) conducts electricity c) has very little reactivity' d) is
DedPeter [7]

Answer:

B) conducts electricity

Explanation:

This answer can be answered by the process of elimination.  Metals are excellent conductors of electricity, which means A is out, and metals are also known to have medium reactivity and have high melting points, meaning C and D are also out.

3 0
2 years ago
Read 2 more answers
Two voltaic cells are to be joined so that one will run the other as an electrolytic cell. In the first cell, one half-cell has
vladimir1956 [14]

Au/Cr cell will run as a voltaic cell and Co/Zn cell will run as an electrolytic cell.

<h3>What is an electrolytic cell?</h3>

An electrolytic cell that uses electrical energy to enable a non-spontaneous redox reaction is known as an electrolytic cell.

Certain chemicals can be electrolyzed using electrolytic cells, which are electrochemical cells.

For example, water can be electrolyzed to create gaseous oxygen and gaseous hydrogen with the use of an electrolytic cell.

The following are the three essential parts of electrolytic cells:

Cathode (which is negatively charged for electrolytic cells)

Anode (which is positively charged for electrolytic cells)

Electrolyte

The reactions for each half cell is given by

Au^{3+}(aq) + 3e^- \rightleftharpoons Au(s) ; E° = 1.50 V

Cr^{3+}(aq) + 3e^- \rightleftharpoons Cr(s) ; E° = –0.74 V

Co^{2+}(aq) + 2e^- \rightleftharpoons Co(s) ; E° = –0.28 V

Zn^{2+}(aq) + 2e^- \rightleftharpoons Zn(s) ; E° = –0.76 V

When the Au/Cr cell will run as a voltaic cell and Co/Zn cell will run as an electrolytic cell, the a difference in the voltages is produced

E^o_{series} = E^o_{Au/Cr} - E^o_{Co/Zn}  = 2.24 V – 0.48 V = 1.76 V

Learn more about electrolytic cell:

brainly.com/question/19854746

#SPJ4

7 0
1 year ago
Other questions:
  • The shape of a liquid's meniscus is determined by ________. the viscosity of the liquid the type of material the container is ma
    12·1 answer
  • Which of the following is used for chemical symbols today
    5·1 answer
  • Calculate the density of a ball if you know its diameter is 15cm and its weight is approximately 2300 g. PLS HELP ILL MARK BRAIN
    13·1 answer
  • PLEASE HELP!!!<br><br> What are 3 types of heat energy transfer?
    6·2 answers
  • _____has particles with the greatest average kinetic energy
    13·1 answer
  • PLEASE HELP!!!
    10·1 answer
  • Genetic material (DNA) can be found in:
    9·2 answers
  • I know this is a lot but I need help on just a few thanks!
    15·2 answers
  • What is wind in more than 15 words?
    13·1 answer
  • How many moles of oxygen gas molecules would you need to make 12.5 moles of water
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!