Recent content by Kakashi

So do we make this assumption because a gas approaching zero pressure corresponds to increasing the volume without bound, so that intermolecular interactions become negligible while the system remains in thermal equilibrium, and this allows temperature to be defined independently of the...

PV/R is not equal to 0 because the molar volume is not fixed. As the pressure decreases the molar volume increases and $$ \frac{P\bar{V}}{R} $$ approaches T.

Consider three systems A,B,and C each containing a fixed amount of gas, whose equilibrium state is specified by two independent intensive variables. We have only a qualitative notion of temperature through our senses, and the zeroth law allows us to define temperature quantitatively. Assume...

Let tX=Number of questions asked. Enumeration Strategy: I ask questions of the form: "Is it in box k?" starting from k=1 Initially each box has probability 1/10. If the answer to "Is it in box 1?" is no, then the prize is uniformly distributed among the remaining 9 boxes and so on. If the...

Consider a coin that is tossed n times, where heads occurs with probability p and tails with probability 1−p. The sample space consists of all possible outcomes of the experiment. At the first stage there are two possible results H or T. For each possible result at the first stage there are 2...

Mod note: Moved from technical math section, so no homework template in post. Is it correct that the success of one link is independent of thte success of other links. For example is P(C->E|A->C)=P(C->E) true? Node A can connect to node B through 3 possible paths: ACEB ACFB ADB If A is...

I sketched the isoclines for $$ m=-1,0,1,2 $$. Since both $$ \frac{dy}{dx} $$ and $$ D_{y} \frac{dy}{dx} $$ are continuous on the square region R defined by $$ -4\leq x \leq 4, -4 \leq y \leq 4 $$ the existence and uniqueness theorem guarantees that if we pick a point in the interior that lies...

I'm working with a simulation file of a specific process, and the task is to test the control scheme by introducing a disturbance, in this case, reducing the feed flowrate (Stream 1) to nearly half its design value for a 12-hour period. The objective is to observe and describe how the system...

When Stream 1 flow rate is cut to nearly half of its design value, the flow control valve adjusts its output to maintain the process variable (PV) at the setpoint (SP). It reaches steady state about 6 minutes after the disturbance. Since the circulating oil stream remains at its design flow...

Thanks for the link, very helpful! I’ll definitely consider adding carbon black to the recycled HDPE to improve UV resistance and extend service life. The article also mentions that mechanical properties depend significantly on the resin grade, which got me thinking about the flakes I’m working...

I am participating in a competition to identify viable new markets for approximately 2,000 tonnes of recycled HDPE collected annually from used oil containers. These include: 19-litre pails (injection molded) – 23% of the total 1-litre and 5-litre jugs (blow molded) – 77% of the total The...

I am working on cleaning a small-batch of HDPE flakes obtained from motor oil containers. My goal is to remove contaminants such as residual oil, and adhesives to evaluate the cleaning efficiency of different solutions.The flakes I received from the processor were supposed to be pre-washed, but...

I apologize my question was vague. I have attached a PDF containing the process description, process flow diagram, stream and utility data. I believe these rules are in place because if the number of hot streams exceeds the number of cold streams some hot streams will remain unmatched and will...

I have attached the process flow diagram for methanol synthesis by steam reforming of natural gas. In this process, low-pressure steam is used in the reboiler, while high-pressure steam is used to preheat the syngas feed to the methanol reactor (130–250°C). I have already optimized the process...