It s bloody, hurry up and answer the questions, physical chemistry, thank you 100

<> recalculate it yourself, and it's OK. I think it's appropriate.

Five-three" this b version is more suitable for medium grades, especially mathematics, really done can be very obvious to improve mathematics scores "Century Gold List" if you have the money to get a teacher's book, it is very good, especially English and Chinese, as well as its three liberal arts, and its "360 synchronous learning strategy" is also good, "Wang Houxiong" is more difficult, its science is better, my second year of high school is a science student, Anhui University in the college entrance examination, the Department of Mathematics, read half a year back to study the liberal arts, and the Xi'an University of Foreign Studies Chinese, English Department,These books are involved,I personally prefer the "Century Gold List", mathematics I recommend "One Year and Month Exam", "Five Three", I take the college entrance examination mathematics 149, English is the "Century Gold List" with a set of synchronous exercises, such as Tianxing "Golden Exam Paper" Episode 2,3,4, I take the college entrance examination English 140, the language "Century Gold List" is enough, the answer method inside is very good, if you study liberal arts, the remaining three I recommend "Century Gold List" or "Guide and Practice", and then with a set of synchronous exercises, you can let your teacher recommend, The questions should be fine, the answers should be very detailed, and it is best to be equipped with knowledge links, if you study science, I recommend "Wusan" and "Wang Houxiong" for physics and chemistry, and I recommend "Century Gold List" for biology, of course, the best book for teachers. Hope it helps.

First of all, you should cultivate an interest in physics, and you should be interested in physics from the heart. You can read more magazines about technology, news, etc. Secondly, learning physics well depends on formulas, and only by being able to flexibly use formulas and understand them can we find a breakthrough in unpredictable problems.

If there is something you don't understand, you can ask your classmates and teachers after class, and you must understand it thoroughly, otherwise the more you learn, the more you won't understand.

Chemistry. To be honest, I didn't do well in this subject at the beginning of my third year of junior high school, but I signed up for a tutorial class and it was much better. There are still more than 40 days to come, and you can ask the teacher to give you more basic lectures.

Chemical formulas or anything, I never memorize them, they all understand, in fact, as long as you understand the laws of reaction, you will write any reaction you see

Chemistry in the second year of junior high school? The most correct way to take the exam is to review the most basic knowledge points, and there are only one or two difficult questions, and if you can't get it, I will give up on him, and just get all the simple ones that should be taken. Don't make difficult questions before the exam.

The method should be summarized by yourself, the college entrance examination mathematics is relatively simple, answer the questions calmly, pay attention to the uniformity of time, the difficulty of the test paper is simpler than the usual simulation, consider the details, don't deal with carelessness, learn to summarize in the simulation, don't immediately hit the draft and count it when you encounter any questions, learn to use your brain, sometimes draw pictures, some questions come out with a little outline of the answer in your mind, put the time in your weak places and more cumbersome places, such as analytic geometry, there are two months, I'm sure you can score more than 130 points, work hard.

First of all, let me ask you, you still have 68 days to take the exam, are you in a hurry? Why the hurry? I'm afraid that I won't do well in the exam, I didn't learn much before, and I lost to others if I lost the foundation, and you have to lose?

I know you're stressed, but think about it, now is the time to calm down ! I don't want to take the articles on other people's pages to PS to make you feel so good, so official!! Does it actually work?

Everyone knows it's just a good feeling! What you really can't do in 68 days! Because what you think about every day is not the subject but what it is

If you want to have a chance to do well in the exam, go buy a very basic paper, the kind of comprehensive one, and do the foundation well, because you can only master the basics!! Physics, you have to do chemistry, figure out all the equations, memorize it!! The most basic math is not easy to say, the luck component is quite large, depending on whether the problem is right or not!

My personal experience: read books carefully, don't care about anything, just read books. In the last month, I will take a rough look at the past college entrance examination questions, and in the last week, I will read the book.

Don't deliberately do any real questions, in fact, what you usually do is a variation of the college entrance examination questions. Read more textbooks and memorize formulas, in fact, mentality is very important.

It's impossible to improve math and physics too much, but you can improve a little more by looking at the basics and reducing mistakes.

Chemistry can improve a lot, as long as you put in the effort to read the knowledge of chemical elements, because chemistry is equivalent to a semi-liberal arts thing, remember it well.

Ask for a tutor, it's the most straightforward.

For mathematics, your teacher should have issued you the basic formulas and common solution methods of the test papers, time is precious, you should hurry up to memorize the formulas inside, and then do an appropriate amount of test questions, of course, the test questions should also be targeted, such as which knowledge will be tested, and what type of common test, you must be familiar with, and do a few more natural things can be improved. For physical chemistry, it is good to read the basic formulas and exercises in the textbook, and then read the previous mistakes again!!

Don't waste any time, you just tell yourself all the time, I'm a computer, I'm a computer, and then you write questions and read English completions.

h=u+pv

u=cvδt

cv=3/2 nr

n=1r=。

pv=-（1/3)×

Don't understand. I ask for it to come out is also b.

According to the first law of thermodynamics, the amount of change u that can be combined within the system should be equal to the heat q transferred to the system by the outer boundary, plus the work w done by the outside world on the system. Since it is an isolated system, there is no heat transfer from the outside world - q=0, and there is no work done by the outside world - w=0, so, u=0.

According to the definition of enthalpy, it is numerically equal to the product of the internal energy u of the system plus the pressure p and the volume v, then h= u+ (pv). Because it is an isolated system, v=0 (otherwise the system will be exchanged with the outside world, it is not an isolated system), so the above equation becomes h= u+( p)v=0+( p)v>0 (according to the topic, the pressure becomes greater - p>0).