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
lana66690 [7]
3 years ago
14

35.5 grams of an unknown substance is heated to 103.0 degrees Celsius and then placed into a calorimeter containing 100.0 grams

of water at 24.0 degrees Celsius. If the final temperature reached in the calorimeter is 29.5 degrees Celsius, what is the specific heat of the unknown substance?
Chemistry
2 answers:
Ierofanga [76]3 years ago
6 0

Answer:

Specific heat of the unknown substance is 0.881 J/gC

Explanation:

Given:

Mass of unknown substance, m(s) = 35.5 g

Initial temperature of the substance, T1 = 103 C

Mass of water, m(w) = 100 g

Initial temperature of water, T1 = 24 C

Final temperature of solution, T2 = 29.5 C

<u>Formula:</u>

Heat (q) absorbed or evolved by a substance is given as:

q = mc\Delta T = mc(T_{2}-T_{1})----(1)

where, m = mass of the substance

c = specific heat

ΔT = change in temperature

<u>Calculation:</u>

Heat lost by the unknown substance = heat gained by water

Based on equation (1) we have:

Heat lost by the unknown substance = -m(s)*c(s)*ΔT

= -35.5*c*(29.5-103) = 2609.25c

heat gained by water = -m(w)*c(w)*ΔT=100*4.18*(29.5-24) =2299

Therefore,

2609.25c = 2299

c = 0.881 J/g C

QveST [7]3 years ago
4 0
<span>delta t for water = 29.5 - 24.0 = 5.5 C heat gained by water = 4.18 J/gC x 100.0 g x 5.5 C = 2300 J sp ht = J/m dt = 2300 J / (35.5 g x 73.5) = 0.89 J/gC<span>
</span></span>
You might be interested in
can you guys help me out??? How do different plant structures increase the chances for successful reproduction? Use evidence to
Roman55 [17]

Answer: Different plant structure can increase chances of reproduction by the animals and other living organisms in the ecosystem.

Explanation: Plants like flowers can be pollinated by bees . The bees carry the pollen and this can increase chances of reproduction. Plants like plums that have large seeds can increase chances of reproduction by there fruit falling and rotting so the seed can be forced into soil. Different structures of plants can increase chances of reproduction through the animals, soil around the plant, as well as weather .

4 0
2 years ago
A mover packs books, CDs, and DVDs into a moving box. If the box contains 6.5 kg of books, 1.5 kg of CDs, and 2.0 kg of DVDs, wh
mariarad [96]
Given: 
<span>M1 = 6.5 kg of books
</span><span>M2 = 1.5 kg of CDs
</span><span>M3 = 2.0 kg of DVDs

Required: percent by mass of each object

Solution:
First, we calculate the total mass.

M = 6.5 kg + 1.5 kg + 2.0 kg =  10 kg

Percent by mass is calculated by getting the ration of the mass of an object and the total mass multiplied by 100 to get the percent.

%M1 = 6.5 / 10 x 100 = 65%
%M2 = 1.5/10 x 100 = 15%
%M3 = 2.0/10 x 100 = 20%</span>
4 0
3 years ago
Read 2 more answers
Explain why the larger the hydrocarbon molecule is the more
RideAnS [48]

Answer:

Longer hydrocarbon molecules have a stronger intermolecular force. More energy is needed to move them apart so they have higher boiling points . This makes them less volatile and therefore less flammable

6 0
2 years ago
Read 2 more answers
If the H+ concentration is 0.00001 M, what is the OH- concentration?
Ne4ueva [31]

Answer:

1.00x10^-9

Explanation:

3 0
2 years ago
The term used by meteorologists for predicting the we ather is
Zielflug [23.3K]
<span>The term used by meteorologists for predicting the we ather is </span>forecasting
3 0
3 years ago
Read 2 more answers
Other questions:
  • The normal boiling point for h2se is higher than the normal boiling point for h2s . this can be explained by
    13·1 answer
  • Why is CaF2 not a molecular formula?
    8·1 answer
  • As the organsims develops, its cells become -------
    11·1 answer
  • Consider the balanced equation for the following reaction:
    13·1 answer
  • A student added 32.60 mL of 0.03020 M NaOH to a 20.0 mL sample of ginger ale before his sample turned pink. (a) How many moles o
    15·2 answers
  • A3B8 + C2 ---&gt; AC2 +
    8·1 answer
  • How many grams is 6.31 x 1024 molecules of BF3 in scientific notation?
    8·1 answer
  • Lonic or Covalent? Fe2O3
    11·1 answer
  • Which equation shows how to calculate how many grams (g) of KCI would be
    13·1 answer
  • 7. Lli(s) + N₂(g) → 2 Liz Ncs)
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!