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
13

What will be the final temperature of the solution in a coffee cup calorimeter if a 50.00 mL sample of 0.250 M HCl(aq) is added

to a 50.00 mL sample of 0.250 NaOH(aq). The initial temperature is 19.50 °C and the Hrxn is −57.2 kJ/mol NaOH. (assume the density of the solution is 1.00 g/mL and the specific heat of the solution is 4.18 J/g∙°C)
Chemistry
1 answer:
padilas [110]3 years ago
5 0

Answer:

21.21°C will be the final temperature of the solution in a coffee cup calorimeter.

Explanation:

HCl+NaOH\rightarrow H_2O+NaCl

\Delta H = enthalpy change = -57.2 kJ/mol of NaOH

Moles of sodium hydroxide = n

Molarity of the NaOH = 0.250 M

Volume of NaOH solution = V = 50.00 mL = 0.050 L

n=Molarity\times V=0.250 M\times 0.050 L= 0.0125 mol

Moles of HCl = n'

Molarity of the HCl= 0.250 M

Volume of HCl solution = V' = 50.00 mL = 0.050 L

n'=Molarity\times V=0.250 M\times 0.050 L= 0.0125 mol

Since 1 mole of Hcl reacts with 1 mole of NaoH. Then 0.0125 mole of HCl will react with 0.0125 mole of NaOH.

The enthalpy change during the reaction.

\Delta H=-\frac{q}{n}

q=\Delta H\times n=-57.2 kJ/mol \times 0.0125 mol= -0.715 kJ=-715 J

q = heat released on reaction= -715 J

now, we calculate the heat gained by the solution.:

Q= -q = -(-715 J) = 715 J

m = mass of the solution = ?

Volume of the solution formed by mixing, v = 50.00 ml + 50.00 mL = 100.00 mL

Density of the solution = density of water = d = 1 g/mL

mass=density\times volume=d\times v=1 g/ml \times 100.00 ml=100 g

m = 100 g

q = heat gained = ?

c = specific heat = 4.18 J/^oC

T_{f} = final temperature = ?

T_{i} = initial temperature = 19.50^oC

Q=mc\times (T_{f}-T_{i})

Now put all the given values in the above formula, we get:

715 J=100 g\times 4.18J/^oC\times (T_f-19.50)^oC

T_f=21.21 ^oC

21.21°C will be the final temperature of the solution in a coffee cup calorimeter.

You might be interested in
What is the value of the equilibrium constant for this redox reaction? 2Cr3+(aq) + 3Sn2+ (aq) 2Cr(s) + 3Sn4+(aq) E = -0.89 v
charle [14.2K]
<span>b. square root of 3 over 3 is the answer to your question!!! I hope I helped!!!!!!!!!!                                                                 XoXo -Marcey<3!  :D
</span>
8 0
3 years ago
Read 2 more answers
PLEASE HELP!!
lana66690 [7]

Answer:

c

Explanation:

3 0
3 years ago
Read 2 more answers
Water droplets forming on the inside of a cold windshield is an example of
8_murik_8 [283]
Condensation I think.
4 0
3 years ago
Read 2 more answers
Which interaction occurs when light goes into an object as heat energy?
Rufina [12.5K]

Interaction occurs when light goes into an object as heat energy is Absorbed light.

Absorbed light makes an object dark. Absorption of light is when the light is absorbed by the object and converts it into heat energy. The objects converts the wavelength of light into the larger wavelength of heat.  this makes the object warmer and produced energy. Absorption depends on the frequency of light that is transmitted. The wavelength of light defined as the distance between the the two successive troughs of the the light wave.

Therefore, Interaction occurs when light goes into an object as heat energy is Absorbed light.

To learn more about Absorbed light here

brainly.com/question/26739493

#SPJ1

8 0
1 year ago
Read 2 more answers
Which section of the reaction represents the reactants
Diano4ka-milaya [45]
A should be the products and D should be the reactants. So D should be the answer.
8 0
3 years ago
Other questions:
  • A sample of nitrogen gas was collected via water displacement. since the nitrogen was collected via water displacement, the samp
    9·1 answer
  • How much 3.0 M NaOH is needed to neutralize 30. mL of 0.75 M H2SO4?
    7·1 answer
  • Which statement is best described as a atom
    5·1 answer
  • One molecule of the oxide of element Z reacts with six molecules of water to
    8·1 answer
  • Plz help! The best answer will be marked as brainliest!
    10·1 answer
  • “A mixture is the chemical bonding of two or more substances in any proportion.” Is this statement true or false? Explain your a
    11·2 answers
  • Methane and chlorine react to form four products: CH3Cl, CH2Cl2, CHCl3, and CCl4. At a particular temperature and pressure, 38.4
    11·1 answer
  • How is energy transferred when objects are in contact A. Conduction B. Convection C. latent heat D. Radiation​
    11·1 answer
  • After the first steps in writing an equation, the equation is balanced by
    7·1 answer
  • A piece of iron is heated to 120'C then placed in a calorimeter containing 50g of water. The water temperature is raised from 30
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!