Why is co2 hard to break apart than h2o
Solved
Show answers
More tips
- P Philosophy Is Everything We Strive for Eventually Achieved and Destroyed?...
- S Sport How to Learn Swimming? Simple Tips for Beginners...
- P Photography and Videography Understanding HDR: How It Works and Why You Need It...
- G Goods and services Which TV is better - LCD or Plasma?...
- S Sport How to Learn to Pull Up on Monkey Bars?...
- L Leisure and Entertainment Scrapbooking: What is it and Why is it Becoming More Popular?...
- C Computers and Internet Where did torrents.ru move to?...
- B Business and Finance Understanding Cash Flow: What It Is and How It Works...
- C Computers and Internet What Are Peers and Seeds in Torrenting?...
- H Health and Medicine 10 Simple Techniques on How to Boost Your Mood...
Answers on questions: Chemistry
- C Chemistry What agent of metamorphism is the most important because it supplies the energy to drive chemical reactions that result in the recrystallization of existing minerals and/or the...
- C Chemistry Construct a Lewis structure for hydrogen peroxide, H2O2, in which each atom achieves a stable noble-gas electron configuration. Draw the molecule by placing atoms on the grid and...
- C Chemistry 10. Identifying Redox Reactions using Oxidation Numbers a) H2SO4 + Ca(OH)2 → CaSO4 + 2H2O b) 4 Fe(s) + 3 O2(g) → 2 Fe2O3(s) c) C3H3(g) + 5 O2(g) → 3 CO2(g) + 4H2O(g) d) CO2(g)...
- C Chemistry What effect does concentration have on enzyme activity according to the graph?...
- C Chemistry A sample of gas in a cylinder as in the example in Part A has an initial volume of 66.0 L , and you have determined that it contains 2.00 moles of gas. The next day you notice...
- C Chemistry Two main reasons for continued interest in middle East A. Oil and terrorism B. Oil and diamonds C. Diamonds and textiles D. Land and religion...
- C Chemistry 4.b. What are some of the problems or limitations with using trees as a renewable resource?...
- C Chemistry A chemist who frequently carries out a complex experiment is likely to have high: a. Precision, but low accuracy b. Precision c.Accuracy, but low precision d.Accuracy...
- C Chemistry Plz mark brainliest 30 points 1) find the momentum of a 12 kg snowball that is rolling with a velocity of 9 m/s. 2) an 8 ball with a mass of .5 kg is sitting at rest. it is hit...
- C Chemistry The table compares the number of electrons in two unknown neutral atoms. comparison of electrons atom number of electrons a 10 d 11 use this information to determine the number...
Ответ:
Question:
A piston–cylinder device contains 0.85 kg of refrigerant- 134a at -10°C. The piston that is free to move has a mass of 12 kg and a diameter of 25 cm. The local atmospheric pressure is 88 kPa. Now, heat is transferred to refrigerant-134a until the temperature is 15°C. Determine (a) the final pressure, (b) the change in the volume of the cylinder, and (c) the change in the enthalpy of the refrigerant-134a.
a) 90.4 kPa
b) 0.0205 m³
c) 17.4 kJ/kg
Explanation:
Given:
Mass, m = 0.85 kg
a) The final pressure here is equal to the initial pressure. Let's use the formula:
= 90398 Pa
≈ 90.4 KPa
Final pressure = 90.4 kPa
b) Change in volume of the cylinder:
To find the initial and final volume, let's use the values from the A-13 table for refrigerant-134a, at initial values of 90.4 kPa and -10°C and final values of 90.4 kPa and 15°C
v1 = 0.2302m³/kg
h1 = 247.76 kJ/kg
v2 = 0.2544 m³/kg
h2 = 268.2 kJ/kg
Change in volume is calculated as:
Δv = m(v2 - v1)
Δv = 0.85(0.2544 - 0.2302)
= 0.0205 m³
Change in volume = 0.0205 m³
c) Change in enthalpy
Let's use the formula:
Δh = m(h2 - h1)
= 0.85(268.2 - 247.76)
= 17.4 kJ/kg
Change in enthalpy = 17.4 kJ/kg