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
Nataliya [291]
3 years ago
12

A 2.50 g sample of solid sodium hydroxide is added to 55.0 mL of 25 °C water in a foam cup (insulated from the environment) and

stirred until it dissolves. What is the final temperature of the solution? ΔHsoln =-44.51 kJ/mol.
Chemistry
1 answer:
zlopas [31]3 years ago
6 0

Answer:

37.1°C.

Explanation:

  • Firstly, we need to calculate the amount of heat (Q) released through this reaction:

<em>∵ ΔHsoln = Q/n</em>

no. of moles (n) of NaOH = mass/molar mass = (2.5 g)/(40 g/mol) = 0.0625 mol.

<em>The negative sign of ΔHsoln indicates that the reaction is exothermic.</em>

∴ Q = (n)(ΔHsoln) = (0.0625 mol)(44.51 kJ/mol) = 2.78 kJ.

  • We can use the relation:

Q = m.c.ΔT,

where, Q is the amount of heat released to water (Q = 2781.87 J).

m is the mass of water (m = 55.0 g, suppose density of water = 1.0 g/mL).

c is the specific heat capacity of water (c = 4.18 J/g.°C).

ΔT is the difference in T (ΔT = final temperature - initial temperature = final temperature - 25°C).

∴ (2781.87 J) = (55.0 g)(4.18 J/g.°C)(final temperature - 25°C)

∴ (final temperature - 25°C) = (2781.87 J)/(55.0 g)(4.18 J/g.°C) = 12.1.

<em>∴ final temperature = 25°C + 12.1 = 37.1°C.</em>

You might be interested in
02:22:18
Artemon [7]

Answer: b design procedure

Explanation:

design a procedure

7 0
3 years ago
Read 2 more answers
How many atoms will be in a 0.010 gram sample of aluminum
Brums [2.3K]
Um let me think ummm dang hold on bro i will be right back ok 
5 0
3 years ago
Plpwkejnrhbgvjdhebr 15 points!
Tanzania [10]

Answer: the answer is b

Explanation:

7 0
3 years ago
Read 2 more answers
Would anyone help <br> !!!!!
balu736 [363]

Answer

Explanation:

Protons would be the first answer since protons have a + charge. Neutrons would be second sicne neutrons have a neutral or 0 charge. Electrons would be the last since electrons have a - charge.

4 0
3 years ago
Read 2 more answers
Look at the image djsksk
S_A_V [24]

<em>You poor human djsksk-</em>

Answer:

The first one is qualitative.

Second one is quantitative.

Third one is qualitative.

Fourth one is quantitative.

Explanation:

Quantitative data is information about quantities; that is, information that can be measured and written down with numbers. Qualitative data is information about qualities; information that can't actually be measured.

I hope this helps! <3

~Sakura Hitoroku

6 0
3 years ago
Other questions:
  • What substance has the highest molar mass?
    8·1 answer
  • Can someone help me
    9·1 answer
  • 100 points !!!! Write your answer beside each number. You should have 13 items labeled in all.
    7·1 answer
  • the diagram shows light striking a pane of glass . some of the light is reflected , and some of the light is transmitted. the le
    11·1 answer
  • A triple covalent bond involves two atoms sharing three pairs of electrons. True or False
    9·1 answer
  • Why did the outside of the bag get wet? From ice melting in the bag
    9·1 answer
  • How does the amount of humidity affect hurricane formation?
    7·1 answer
  • Definition of instantaneous speed
    14·1 answer
  • Need help asap thanks
    11·2 answers
  • Which colour would you expect ekasilicon to be
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!