Determine the thermodynamic state of 1,1,1,2-Tetrafluoroethane (R-134a) at 102 °C and 1000 kPa. Critical Pressure= 4.059 MPa, Critical Temperature = 101.06°C.
*I keep getting stuck with a quadratic equation and two volume values, when using the van der Waals equation of state (P=(RT/(V-b))-(a/V^2))....I am determining the thermodynamic state by finding if the compressibility factor (z) is less than or greater than 1, to find if attractive or repulsive forces dominate.
In: Other
In: Other
Let’s explore the scientific method. Here is the situation: We are planting a garden. We have a variety of bulbs and potted plants. We do not have any directions on how or when to plant each of these items. We do not have any gardening books, magazines, or access to the Internet (Oh, the horror!). We need to observe a number of characteristics for these plants. What are some of the characteristics that we want to observe? What might be your initial hypothesis? How would you set up an experiment to test your hypothesis?
In: Other
What are the heat capacity constant (Cp) values for C10H8 ,O2 , C8H4O3 ,CO2 and H2O at 600 K according to the Antoine equation?
In: Other
In: Other
A set of four group orbitals derived from four 3s atomic orbitals in necessary to examine the bonding in [PtCl4]-, a square planar complex. Deduce the wave function equations for these four SALCs using the 3s labeling scheme specified, starting with the irreducible representations for these group orbitals. Using sketches of the deduced orbitals, symmetry characteristics of the representation, and a coefficient table like in Section 5.4.4, deduce the SALCs not derived initially from the character table analysis. Provide normalized equation and sketch each group orbital.
In: Other
Electrolyte balance is necessary to maintain homeostasis. What are those electrolytes? Which are cations and which are anions? What are the normal values for humans? How can they be replaced? Which IV fluids contain which electrolytes?
In: Other
You are provided with some weight of specimen data as a function of time following exposure of
an alloy specimen to oxygen at high temperature.
(i) Determine whether or not the alloy follows a particular oxidation rate law during the
initial one hour period; if so, specify which one and determine the oxidation rate constant.
(ii) Is there any change in the oxidation rate law in the following 20 hour period? If so,
specify the new law and estimate the oxidation rate constant.
(iii) Account for the change in oxidation rate after 25 hours exposure and calculate the
relevant oxidation rate constant in the period : 25 hours to 100 hours.
Total surface area of specimen : 10cm²
Initial weight of specimen : 1000 mg
Oxidation time Weight of specimen Oxidation time Weight of specimen
(mg) (mg)
1 minute 1000.1 15 h 1023.2
2 minute 1000.2 20 h 1026.3
5 minute 1000.5 25 h 1029.0
20 minute 1001.9 30 h 1029.5
40 minute 1004.1 40 h 1030.0
60 minute 1005.9 50 h 1025.0
2 h 1008.3 70 h 1015.0
3 h 1010.2 80 h 1010.0
4 h 1011.5 100 h 1000.0
10 h 1018.7
(iv) If the corresponding scale thickness data are as follows, plot the relationship between y and t for the full period: 0 to 100 hours.
Oxidation time Scale thickness (µm)
0 minutes 0
5 minutes 0.5
40 minutes 3.9
60 minutes 5.8
10 hours 18.9
20 hours 26.0
25 hours 28.0
30 hours 28.5
In: Other
Methane is compressed adiabatically in a pipeline pumping station from 3500 kPa and 35°C to 5500 kPa at a rate of 1.5 kg mol·s−1. If the compressor efficiency is 0.78, what is the power requirement of the compressor and what is the discharge temperature of the methane? ( if you could explaine it step by step )
In: Other
what is vital records, what do they do, and what kind of information do they get?
In: Other
1) A business model is a plan that details how a company creates revenue.
a) True
b) False
2) The benefits of Business 2.0 include content sharing through open sourcing, user-contributed content, and collaboration inside and outside the organization.
a) True
b) False
3) The main advantage of ebusiness is the opportunity to open new markets.
a) True
b) False
In: Other
Social networking has changed the way we communicate with other people. You can communicate with almost
anyone but there are pros and cons to this way of staying connected. Using the points below, share some ideas
related to this topic. Please add reasons/ explanations for your answers. You may add other necessary points as
much as possible.
Question 1:
● What type of communication do you use the most? I.e.: phone, text, or email. State your reason(s).
In: Other
Which of the following was the result in Authors Guild v. Google, the case in the text involving whether Google violated the copyright rights to authors by scanning books and establishing a publicly available search function making snippets of text available?
a. That Google violated the rights of the book copyright holders because while Google had the right to scan the books, it had no right to institute a search function available to the public.
b. That Google did not violate the rights of the book copyright holders because, while the fair use doctrine was inapplicable, Google was involved in digital imaging, a protected activity.
c. That Google violated the rights of the book copyright holders because Google had no right to scan the contents of the publications.
d. That the activities of Google augmented public knowledge and that Google did not lose the protection of the fair use doctrine based on its profit motivation.
In: Other
Which of the following statements is false?
Group of answer choices
Some decisions involve a limited number of alternatives.
Value is the contribution of an alternative to the decision maker’s goals.
For most businesses, identifying the set of alternatives is one of the more important tasks of management.
Decisions help organizations accomplish goals.
When determining their goals, individuals generally agree on the factors they consider and the importance they attach to the various factors.
In: Other
50 ml of hot water was mixed with 50ml of cold water in a calorimeter. The initial temperature of the cold water is 22°C, the initial temperautre of hot water is 79°C, the average temperature is 50.5°C, the temperature at time 0 is 46.333°C.
What is the heat lost by hot water, the heat gained by cold water, the heat gained by calorimeter in J, temperature change of the calorimeter, the heat capacity (C) of the calorimeter in J/°C, and the average heat capacity of calorimeter in J/°C? Please show work
In: Other