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
lawyer [7]
3 years ago
12

A gas mixture at 535.0°C and 109 kPa absolute enters a heat exchanger at a rate of 67.0 m3/hr. The gas leaves the heat exchanger

at 215.0°C. The change in enthalpy of the gas during the cooling process is -5.00 kJ/mol. What is the heat required in kW? Assume the gas behaves ideally and that the changes in kinetic and potential energy are negligible.
Chemistry
1 answer:
SVEN [57.7K]3 years ago
7 0

Answer:

the heat rate required to cool down the gas from 535°C until 215°C is -2.5 kW.

Explanation:

assuming ideal gas behaviour:

PV=nRT

therefore

P= 109 Kpa= 1.07575 atm

V= 67 m3/hr = 18.6111 L/s

T= 215 °C = 488 K

R = 0.082 atm L /mol K

n = PV/RT = 109 Kpa = 1.07575 atm * 18.611 L/s /(0.082 atm L/mol K * 488 K)

n= 0.5 mol/s

since the changes in kinetic and potencial energy are negligible, the heat required is equal to the enthalpy change of the gas:

Q= n* Δh = 0.5 mol/s * (- 5 kJ/mol) =2.5 kW

You might be interested in
What is the purpose of galvanization?​
frutty [35]
Galvanizing protects from rust in a number of ways: It forms a barrier that prevents corrosive substances from reaching the underlying steel or iron. The zinc serves as a sacrificial anode so that even if the coating is scratched, the exposed steel will still be protected by the remaining zinc.
4 0
3 years ago
Student A performed gravimetric analysis for sulfate in her unknown using the same procedures we did . Results of her three tria
soldi70 [24.7K]

Answer:

The answer is Sodium Sulfate = Na2SO4  

Explanation:

Molar mass of sulfate = 1 (S) + 4 (O) = 1 (32) + 4 (16) = 32 + 64 = 96  

Molar mass of sodium sulfate = 2 (23) + 96 = 46 + 96 = 142  

% of Sulfate = (96/142)*100 = 67.6%  

Percent mistake in Studen A,  

(I) % mistake = (67.6 - 68.6)/67.6 = 1.48  

(ii) % mistake = (67.6 - 66.2)/67.6 = 2.07  

(iii) % mistake = (67.6 - 67.1)/67.6 = 0.74  

For understudy B  

(I) % mistake = (67.6 - 66.7)/67.6 = 1.33  

(ii) % mistake = (67.6 - 66.6)/67.6 = 1.48  

(iii) % mistake = (67.6 - 66.5)/67.6 = 1.63  

Sutdent An is some how exact.  

Understudy B is exact however not precise.

8 0
3 years ago
How many grams of sodium nitrate. NaNO3, are soluble in 100
natka813 [3]

Answer:

Your correct answer is D. 40 g

Explanation:

Please mark brainliest!

4 0
3 years ago
Read 2 more answers
During lab, you measured the heat of reaction by mixing solutions of FeCl3 and NaOH.
Kobotan [32]

Explanation:

pls, refer to the above picture, i hope you will find it helpful.

6 0
3 years ago
What is the first step for response to an emergency situation?
Misha Larkins [42]

Answer:

Back away from the situation and tell the supervisor/teacher

5 0
3 years ago
Other questions:
  • A food web shows
    6·1 answer
  • Which elements are magnetic in the periodic table?
    7·1 answer
  • Is the flame test a test for the cation (metal listed first) or the anion (nonmetal listed second)?
    5·1 answer
  • Objects placed together eventually reach the same temperature. when you go into a room and touch a piece of metal in that room,
    6·1 answer
  • Which statement best describes how dynamic equilibrium relates to a saturated solution of sodium chloride? The concentration of
    11·2 answers
  • Who is john dalton,jj Thompson and ernest Rutherford ​
    5·1 answer
  • What is the mass of 1 mole of MgSO4?
    7·1 answer
  • True or false: Some parasites have complex life cycles where they live in different species of hosts at different stages
    9·2 answers
  • My insta is gageisgod7j7 HMU
    6·2 answers
  • One central them of Jesus' message was the kingdom of _______?
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!