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
slava [35]
2 years ago
10

When a chemical reaction is run in aqueous solution inside a calorimeter, the temperature change of the water (and Ccal) can be

used to calculate the enthalpy change for the reaction. Here, we will study the reaction of hydrochloric acid with sodium hydroxide in the calorimeter from problem 3. Equal volumes (50.0 mL) of 1.00 M sodium hydroxide and 1.00 M hydrochloric acid are mixed.
HCl+NaOH→NaCl+H2O
1. What is the total change in enthalpy (in Joules) for the reaction?
2. Where initial temperature is 21.2 °C and final temperature is 28.0 °C. Ccal is 1234.28 j
Chemistry
1 answer:
Yakvenalex [24]2 years ago
6 0

Answer:

The total change in enthalpy for the reaction is - 81533.6 J/mol

Explanation:

Given the data in the question;

Reaction;

HCl + NaOH → NaCl + H₂O

Where initial temperature is 21.2 °C and final temperature is 28.0 °C. Ccal is 1234.28 J

Moles of NaOH  = 50.mL × 1.00 M = 50.0 mmol = 0.0500 mol

Moles of HCl = 50.mL × 1.00 M = 50.0 mmol = 0.0500 mol

so, 0.0500 moles of H₂O produced

Volume of solution = 50.mL  +  50.mL  = 100.0 mL

Mass of solution m = volume × density = 100.0mL × 1.0 g/mL = 100 g

now ,

Heat energy of Solution q= (mass × specific heat capacity × temp Δ) + Cal

we know that; The specific heat of water(H₂O) is 4.18 J/g°C.

so we substitute

q_soln = (100g × 4.18 × ( 28.0 °C - 21.2 °C) ) + 1234.28

q_soln = 2842.4 + 1234.28

q_soln = 4076.68 J

Enthalpy change for the neutralization is ΔH_{neutralization}

ΔH_{neutralization} = -q_soln / mole of water produced

so we substitute

ΔH_{neutralization} = -( 4076.68 J ) / 0.0500 mol  

ΔH_{neutralization} = - 81533.6 J/mol

Therefore, the total change in enthalpy for the reaction is - 81533.6 J/mol

You might be interested in
Which is the FALSE statement about C-14?
slega [8]

The answer is: A


C-14 is not stable and this is the reason why it goes through radioactive decay.

7 0
3 years ago
Read 2 more answers
A variation of the acetamidomalonate synthesis can be used to synthesize serine. The process involves the following steps: Ethox
Alex73 [517]

Answer:

See detailed mechanism in the image attached

Explanation:

The mechanism shown in detail below is the synthesis of serine in steps.

The first step is the attack of the ethoxide ion base on the diethyl acetamidomalonate substrate giving the enolate and formaldehyde.

The second step is the protonation of the oxyanion from (1) above to form an alcohol as shown.

Acid hydrolysis of the alcohol formed in (3) above yields a tetrahedral intermediate, a dicarboxyamino alcohol.

Decarboxylation of this dicarboxyamino alcohol yields serine, the final product as shown in the image attached.

5 0
3 years ago
An average quality lawn captures ______ times the carbon output of a typical gasoline-powered mower
valina [46]
An average quality lawn captures 4 times the carbon output of a typical gasoline-powered mower.
5 0
3 years ago
What is your experience in stars??
chubhunter [2.5K]

Answer:

Experience in star is very nice

Explanation:

Because i love stars

6 0
3 years ago
Are watches considered as compound machines?
Alisiya [41]
Yes. They are called compound machines because two or more simple machines were combined to create it.
5 0
3 years ago
Other questions:
  • Maria rolls a die. What is the chance of her rolling a 4?
    8·2 answers
  • 11.You run 100 m in 25 s. If you then run the same distance in less time, does your aver- age speed increase or decrease? Explai
    9·1 answer
  • The rate of a reaction or how quickly a reaction will proceed is best determined by?
    14·1 answer
  • What are 3 things an Apple, Knife and Mirror have in common? 
    10·1 answer
  • Formula to find time​
    5·1 answer
  • 5. A gas has a pressure of 1.26 atm and occupies a volume of 7.40 L. If the gas
    13·1 answer
  • The ability of a substance to dissolve in another substance?
    8·2 answers
  • Please answer this question please brianlest
    15·1 answer
  • (e) Another student investigated the rate of a different reaction
    10·1 answer
  • Plsss help me :(((
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!