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
Arada [10]
3 years ago
14

The metal sample suspected of being aluminum is warmed and then submerged into water, which is near room temperature. The final

temperature of the water and the metal is given below. The specific heat capacity of water is 4.18 J/g.oC. Calculate the specific heat capacity of the metal based on the data below. Remember heat lost = heat gained.
Type of metal used:
Trial 1 Trial 2 Trial 3
Mass of metal, g 2.746 g 2.750 g 2.900 g
Mass of water, g 15.200 g 15.206 g 15.201 g
Initial Temp. of Water, oC 24.7 oC 24.6 oC 24.5 oC
Initial Temp. of Metal, oC 72.1 oC 72.2 oC 71.9 oC
Final Temp of Water & Metal,oC 26.3 oC 26.2 oC 24.7 oC
ΔT for water, oC ______ ______ ______
ΔT for metal, oC ______ ______ ______
Specific heat capacity of metal, J/g.oC ______ ______ ______
Average specific heat capacity, J/g .oC ______ (use two significant figures due to ΔT of water)
Chemistry
1 answer:
Svetach [21]3 years ago
4 0

Answer:

Average specific heat capacity of metal = 0.57 J/g°C

Explanation:

Heat lost = Heat gained

Heat energy gained or lost, H = mcΔT

where m = mass of substance, c = specific heat capacity, ΔT = temperature change

Trial 1:

Heat lost by metal = -[2.746 g × c × ΔT]

ΔT = (26.3 - 72.1) °C = -45.8 °C

Heat lost by metal = -[2.746 g × c × (-45.8 °C)] = c × (125.7688)g°C

Heat gained by water = 15.200 × 4.18 × ΔT

ΔT = (26.3 - 24.7) = 1.6 °C

Heat gained by water = 15.200 × 4.18 × 1.6 = 101.6576 J

From Heat lost = Heat gained

c × (125.7688)g°C = 101.6576 J

c = 101.6576 J / 125.7688 g°C

c = 0.8083 J/g°C

Trial 2:

Heat lost by metal = -[2.750 g × c × ΔT]

ΔT = (26.2 - 72.2)°C] = - 46 °C

Heat lost by metal = -[2.750 g × c × (-46 °C)

Heat lost by metal = c × (126.5) g°C

Heat gained by water = 15.206 × 4.18 × ΔT

ΔT = (26.2 - 24.6) = 1.6 °C

Heat gained by water = 15.206 × 4.18 × 1.6 = 101.697728 J

From Heat lost = Heat gained

c × (126.5)g°C = 101.6977 J

c = 101.697728 J / 126.5 g°C

c = 0.8039 J/g°C

Trial 3:

Heat lost by metal = -[2.900 g × c × ΔT]

ΔT = (24.7 - 71.9)°C] = - 47.2 °C

Heat lost by metal = -[2.900 g × c × (- 47.2 °C)

Heat lost by metal = -[2.900 g × c × (- 47.2)°C] = c × (136.88)g°C

Heat gained by water = 15.201 × 4.18 × ΔT

ΔT = (24.7 - 24.5) = 0.2 °C

Heat gained by water = 15.201 × 4.18 × 0.2 = 12.708036 J

From Heat lost = Heat gained

c × (136.88)g°C = 12.708036 J

c = 12.708036 J / 136.88 g°C

c = 0.0928 J/g°C

Average specific heat capacity of metal = (0.8083 + 0.8039 + 0.0928) J/g°C / 3

Average specific heat capacity of metal = 0.57 J/g°C

You might be interested in
What are the products of the reaction below?:<br> calcium chloride+ silver nitrate
WARRIOR [948]

Answer:

Calcium chloride react with silver nitrate to produce calcium nitrate and silver(I) chloride.

6 0
3 years ago
Read 2 more answers
A mixture that separates into different layers when you stop stirring it is Select one: a. a solution. b. a suspension. c. a col
leva [86]

Answer: b suspension

a suspension is a heterogeneous mixture that contains solid particles sufficiently large for sedimentation . The particles may be

visible to the naked eye, usually must be larger than one micrometer , and will eventually settle, although the mixture is only classified as a suspension when and while the particles have not settled out. A suspension is a heterogeneous mixture in which the solute particles do not dissolve , but get suspended throughout the bulk of the solvent , left floating around freely in the medium. [1] The internal phase (solid) is dispersed throughout the external phase (fluid) through mechanical agitation , with the use of certain excipients or suspending agents.

An example of a suspension would be sand in water. The suspended particles are visible under a

microscope and will settle over time if left undisturbed. This distinguishes a suspension from a colloid , in which the suspended particles are smaller and do not settle.

Colloids and suspensions are different from

solution , in which the dissolved substance (solute) does not exist as a solid, and solvent and solute are homogeneously mixed.

8 0
3 years ago
Which of the following elements is the most reactive?    A. Arsenic (As)    B. Sulfur (S)    C. Fluorine (F)    D. Carbon (C
adell [148]
I think its a but i could be wrong

4 0
3 years ago
Read 2 more answers
____Fe2O3 + ___H2O --&gt; ___Fe(OH)3
Novosadov [1.4K]

Answer:

Fe2O3 + __3_H2O --> __2_Fe(OH)3

Explanation:

____Fe2O3 + __3_H2O --> __2_Fe(OH)3

        Fe -2                                        Fe -2

        H - 6                                         H - 6        

        O - 6                                         O- 6                                                                      

8 0
3 years ago
Water molecules have a polarity, which allows them to be electrically attracted to other water molecules and other polar molecul
-BARSIC- [3]
<h3>Answer:</h3>

            Water molecules have a polarity, which allows them to be electrically attracted to other water molecules and other polar molecules by weak chemical bonds known as <u>Hydrogen Bond</u>.

<h3>Explanation:</h3>

                     Hydrogen Bond Interactions are those interactions which are formed between a <em>partial +ive</em> hydrogen atom bonded directly to most electronegative atoms (i.e. Fluorine, Oxygen and Nitrogen) of one molecule interacts with the <em>partial -ive</em> most electronegative atom of another molecule. These interactions are considered the strongest intermolecular interactions and are responsible for many stronger physical properties of water like, boiling point, viscosity, solubility e.t.c.

                       Attached figure shows the hydrogen bond interactions (green dashed lines) between water molecules. The partial charges are shown in red color.

4 0
3 years ago
Other questions:
  • why do valence electrons form bonds to create molecules and compounds? A. they are weaker than the electrons found closer to th
    6·2 answers
  • Which of the following is an example of chemical energy changing into radiant energy
    12·1 answer
  • Inertia describes which of the following? how long an object is how large an object is how difficult it is to change an object's
    5·2 answers
  • How many of the following are oxidation-reduction reactions? I. reaction of a metal with a nonmetal II. synthesis III. combustio
    10·1 answer
  • Find value of x<br>(6xx) + (7x100-3<br>6<br>6.94<br>100<br>100​
    9·1 answer
  • What is the mass, in grams, of
    10·1 answer
  • What is the weight on earth of a girl with a mass of 26 kg? N
    8·1 answer
  • Is the following chemical equation balanced?<br> C₁₀H₂₂ + 31 O₂ ⟶ 20 CO₂ + 22 H₂O
    5·1 answer
  • can I get some help.and no link I have the table already I just need the information​. it's graded please​
    13·1 answer
  • What's the volume of 0.2 mol of hydrogen at STP.
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!