Chapter 152 Carnot’s Theorem

It was detected that Xiaobai had a blocked bladder, and the treatment cost more than 800, all paid for by Gu Ningshan. Judging from the fact that she still calmly browsed her mobile phone to make purchases after seeing the price, Wu Bin felt that this child...

He must be a rich man.

After listening to the doctor's instructions, the two left the pet hospital together.

Glancing at Xiaobai, who looked much more comfortable in the cat bag, Wu Bin asked, "The doctor said it still has to take medicine every day. Can you take care of it?"

Gu Ningshan nodded: "I know a senior who is willing to help adopt stray cats. I will go find her later. When Xiaobai is well, I will go to the group to find an adopter for him."

"Oh, all right."

"Why did Xiaobai take the initiative to approach you? I've been feeding it for several days, but it ran away when it saw me approaching." Gu Ningshan's little face was filled with anger, and her words were full of dissatisfaction.

Wu Bin: "I've always been attracted to cats since I was a kid. Cats generally like to cling to me."

Looking at Wu Bin with a casual tone, Gu Ningshan's face was filled with envy.

While sitting on the bus on the way back, Gu Ningshan suddenly chatted with Wu Bin about the relationship between the thermal value of Carnot's theorem and the second law of thermodynamics, which aroused Wu Bin's great interest.

So the two of them used Carnot's theorem and the first law of thermodynamics to derive two common expressions of the second law of thermodynamics, revealed the equivalence of Carnot's theorem and the second law of thermodynamics, and gave new thermodynamic entropy and Maxwell relations. The derivation method summarizes the various applications of Carnot's theorem and makes an objective evaluation of the application value of Carnot's theorem.

"In fact, there is no need to use the state function S. Many problems can be solved just by relying on Carnot's theorem and the first law of thermodynamics."

Wu Bin took out his notebook and pen from his schoolbag and said while writing: "To be specific, the injection system works between two heat sources with a temperature difference ΔT → 0 to complete a reversible Carnot cycle. In this way, at p- The V diagram forms an infinitely flat quadrilateral..."

"Are you a contestant?" Gu Ningshan asked suddenly, looking at Wu Bin who looked excited.

"Well, I participated in the physics competition." Wu Bin nodded, and then continued: "If the volume changes ΔV → 0, the quadrilateral will be reduced to an infinitesimal parallelogram, so it is easy to calculate. "

Gu Ningshan nodded and asked: "Have you learned how to use Carnot's theorem to calculate the heat released by a reversible battery during isothermal charging, and to balance the internal energy density of the radiating photon gas?"

"Huh? Is there such an application?" Wu Bin stared at Gu Ningshan, his eyes shining.

"Pfft... Hahaha." Looking at Wu Bin's eyes, Gu Ningshan suddenly laughed.

"What's wrong?" Wu Bin asked inexplicably.

Gu Ningshan waved her hand and said, "Nothing, nothing, I just think you are quite similar to the same person."

After saying that, Gu Ningshan found that the bus had arrived, so she took Wu Bin and got out of the bus.

"Thank you for your help today. I have to send Xiaobai to my senior sister first." After getting off the car, Gu Ningshan took the cat bag from Wu Bin's hand and said.

"Oh... that's okay."

Seeing Wu Bin's eyes full of reluctance, Gu Ningshan smiled and took out her phone and said to Wu Bin: "Why don't you add me on WeChat? If you want to see Xiaobai, I can send you some photos."

"Okay." Wu Bin nodded and scanned Gu Ningshan's QR code.

After adding friends, Gu Ningshan waved to Wu Bin and left, while Wu Bin was filled with melancholy.

‘I don’t know if the application of Carnot’s theorem in the battery field can be explained clearly on WeChat...’

Seeing that it was almost time for dinner, Wu Bin felt that he had almost finished experiencing HKUST, so he took out his phone and called Professor Song Nanfeng.

"Hey, Wu Bin, are you here?" Song Nanfeng answered the phone and asked.

Of course Wu Bin told Song Nanfeng that he was coming today before he came, but he didn't say the specific time.

"Well, it's at the school gate."

"Okay, just wait a moment and I'll come pick you up."

About ten minutes later, Song Nanfeng rode a yellow bicycle to the school gate.

After saying hello to Wu Bin, Song Nanfeng took him to the bicycle rental point on the HKUST campus to help him borrow a bicycle, and then started to visit the campus.

"Professor Song, I have a question, why are there so few students on the HKUST campus..." Wu Bin couldn't help but asked out of curiosity after riding past the Mushroom Pavilion and finding that there were still no students inside.

Song Nanfeng smiled after hearing this and said, "Want to see a place with a lot of people? OK, I'll take you there."

When passing by a trail called Red College Road, Song Nanfeng told him that it was based on the school motto of HKUST: "Red Colleges advance side by side, and theory and practice blend."

"Sounds very missionary."

"Hey, you've hit the nail on the head. The University of Science and Technology was built as soon as it was proposed and opened that year. The students and teachers do have a strong sense of mission."

While visiting and chatting, Song Nanfeng took Wu Bin to a very large playground, and here, Wu Bin finally met the HKUST students he "had longed for".

Looking at the athletes galloping on the playground, Song Nanfeng introduced to Wu Bin: "Our University of Science and Technology... although we don't have a sports major and no students with sports specialties, we have repeatedly won awards in various sports competitions. Last year Our dragon boat team also broke the 700-meter track record of C9 University."

Wu Bin heard the term C9 universities from Li Yan. It is composed of Peking University, Jinghua University, Aurora University, Shanghai Jiaotong University, Jinling University, Zhejiang University, Huaguo University of Science and Technology, and Heerbin University of Technology. , Daxing Jiaotong University, a nine-school alliance composed of nine top universities.

Alliances often carry out various substantive activities, such as sending exchange students to each other, holding seminars, and conducting summer camps.

Now after listening to Professor Song Nanfeng's words, Wu Bin understood that there seemed to be a lot of sports competitions among the nine schools.

"This is really...unexpected." Wu Bin sighed after thinking about it.

"Why, did you think that all students at HKUST were nerds? The kind who would bump into trees while walking?"

"That's not true." Wu Bin waved his hand, "It's just that the top students in my imagination are indeed quite weak."

"Hahaha." Professor Song Nanfeng laughed for a while, "Everyone practices sports for the sake of a better body, because that way they can do academic work better."

"Yeah, that makes sense." Wu Bin nodded.

"I think you are quite strong and suitable for our school." Song Nanfeng squeezed Wu Bin's arm muscles and said with a smile.

Wu Bin smiled and said nothing.

Song Nanfeng was not in a hurry, and added: "There are three places with the most students in HKUST. One is the study room, and the other is the gym and gymnasium. Oh, by the way, our gym is free."

"Where's the third one?" Wu Bin asked.

"Of course it's the library. Do you want to take a look?"

When Wu Bin heard this, he immediately became interested, stepped on his bicycle and said eagerly: "Then ask the professor to lead the way."