U is the internal energy, which is the amount of energy a system holds in both kinetic and potential energy. H is the enthalpy, which is the amount of heat released or absorbed by a system at constant pressure. Thus, U is the total energy held by a system while H is specifically the energy that is transferred to/from a system in the form of heat.
What is the difference between H+ and H2?
The H+ hydrogen ion is the basis of the pH scale that runs from 0 to 14. This scale is measuring the proton or acid concentration of any liquid. The molecular form of hydrogen is more common. H2 is a gas which forms when two hydrogen atoms H+ bond together and become a hydrogen molecule.
What is the difference between H and H+ hydride ion?
The H + hydrogen ion is the basis of the pH scale. Hydride is a hydrogen atom which has an extra electron. This means that it is a negatively charged ion, or anion. That is why Hydride ion (H-) has the minus sign distinguishing it from a regular Hydrogen atom (H).
What is the relationship between H+ and pH?
More H + = more acidic. Less H + = more alkaline. Because H+ immediately associates with H 2 O to form H 3 O + (Hydronium), pH can also be said to be a measurement of the concentration of H 3 O + in a solution. The pH scale is logarithmic.
What is the molecular structure of H-H-O?
4 Answers. There is no molecule in existence with the structure H-H-O, for the simple reason that hydrogen possesses only one orbital and is therefore chemically incapable of forming more than one bond or maintaining more than two electrons in its orbit. Therefore, the formula is either a very idiosyncratic way of denoting a molecule of water...
What is the difference of H and H?
H2 is molecular hydrogen, which is mostly gaseous and extremely flammable. It is a molecule consisting two hydrogen atoms. Whereas H is hydrogen, neutral and an atom.
What is the difference between H 2H and H2?
H is one atom of hydrogen . H2 is two atoms of hydrogen that is one molecule of hydrogen. 2H is two molecules of hydrogen.
What does H+ mean in chemistry?
hydrogen ion, strictly, the nucleus of a hydrogen atom separated from its accompanying electron. The hydrogen nucleus is made up of a particle carrying a unit positive electric charge, called a proton. The isolated hydrogen ion, represented by the symbol H+, is therefore customarily used to represent a proton.
Why is hydrogen H2 and not H?
In other words, two hydrogen atoms (H) are covalently bonded (a type of chemical bond) together as H-H. Because there are two hydrogen atoms, we call this diatomic hydrogen, di meaning two. Because the hydrogen atoms are covalently bonded together they form a molecule; so H2 is also referred to as molecular hydrogen.
What is the difference between hydrogen 1 and 2?
There are three isotopes of the element hydrogen: hydrogen, deuterium, and tritium. How do we distinguish between them? They each have one single proton (Z = 1), but differ in the number of their neutrons. Hydrogen has no neutron, deuterium has one, and tritium has two neutrons.
What is the difference between 2H and H2 Brainly?
Answer. Answer: 2H means two separate hydrogen atoms. H2 means a hydrogen molecule which two hydrogen atoms bond together.
Is hydrogen H2 or H?
Hydrogen, H, is the lightest element with the atomic number 1. It is a colorless, odorless, tasteless, and highly flammable gas with the molecular formula H2.
Why is H+ called a proton?
Hydrogen ion is also called proton because it having only one proton inside the nucleus of an atom . H+ ion does not contain electrons or neutrons.
What is the difference between a proton and a positively charged hydrogen ion?
There is no chemical difference, only a psychological one: how do you think about it. They are both the same thing, but many people associate H+ ions with chemical reactions and protons with particle physics. A hydrogen atom has one electron and a proton, no neutron. Therefore H+ is just a proton.
Which is more stable H+ or H?
H is more stable because H+ has charge..and its is replaceable...
Why do we always write hydrogen as H2?
When two hydrogen atoms come together, it results in formation of a hydrogen molecule with two electrons in the outermost shell. Since hydrogen has only one shell, two electrons make it stable as molecule. Thus hydrogen, in natural form exists as H2 instead of H.
Is H+ A gas?
This would be H+ ions swimming in a sea of electrons. It requires intense energy to keep this state, and without an input of heat the plasma will condense to hydrogen atoms, which will then form hydrogen gas.
Atomic hydrogen is number 1 on the Periodic Table of Elements. It consists of a single proton and is an oxidant or acid
However an atom of hydrogen rarely exists on its own because its unpaired proton eagerly seeks to join up with an electron stealing life-force energy from the body.
The pH scale
The pH scale is logarithmic. Increasing by 1 on the pH scale results in a 10 times decrease in the proton ion concentration and increasing by 3 on the pH scale results in a 1,000 times decrease in the proton ion concentration.
Foods are Either Proton Donors and Electron Acceptors or Electron Donors and Proton Acceptors!
The foods and liquids you ingest (see pictures below) are either proton donors poisoning your body and making you sick or electron donors providing you with energy and base protection.
Some of the most acidic, proton donating foods, drinks and supplements are
1) Eggs 2) Pork 3) Chicken 4) Beef 5) Turkey 6) Vinegar 7) HCL found in all drugs and supplements 8) Enzymes 9) Alcohol 10) Cheese 11) Ice Cream 12) Black tea 13) Coffee 15) Corn 16) Peanuts 17) All fermented foods like soy sauce 18) All the "ose" like fructose, sucrose, maltose, lactose, etc 19) Carbonated water or sodas 20) Chocolate
Some of the most alkaline, electron donating foods, drinks and supplements are
1) Alkaline water at a pH of 9.5 with an electrical potential of -250 Mv.
H1 Chemistry Scheme of Assessment
After covering the H1 chemistry syllabus, you sit for two exam papers.
H2 Chemistry Scheme of Assessment
A-level H2 is broader than H1 because it has more topics that are more complex. Therefore, when you choose to take it, you will sit for four papers.
H3 Scheme of Assessment
A-Level H3 chemistry is not for the faint-hearted. It is taken by H2 students who want to have a deeper understanding of chemistry. This paper takes one year to complete, that is, in the second year at Junior college. Also, the syllabus is an extension of H2 chemistry.
What is H3 Chemistry?
What about H3 Chemistry. H3 Chemistry is only available to students who have scored good grades during their first year in JC. The purpose of the subject is to further develop the top 10-15% of students within the cohort. As such, it is not a subject that is pursued when you first enter JC.
What is the second H2 science subject?
The second H2 science subject can either be biology or physics. In addition, you should expect to undergo entrance interviews.
What is the most common combination of subjects taken at A level?
Statistically, the most common combination of subjects taken at ‘A’ levels is the PCME combination . PCME refers to the subjects of Physics, Chemistry, Mathematics and Economics. Many students aspiring to work in chemistry or related fields of science or engineering do tend to choose this combination of subjects.
What courses are required for H2 Chemistry?
3 courses under the NUS Faculty of Science have H2 Chemistry as a pre-requisite. These are Life Sciences, Pharmacy and Food Science & Technology. In all 3 cases, you must have a pass in H2 Chemistry, H2 Biology and either Mathematics or Physics.
What do you need to do well at H1 or H2?
To do well at either H1 or H2 levels, students will need to demonstrate: An understanding of the nature of scientific knowledge. Ability to apply science inquiry skills.
Is H3 a subject in JC?
As such, it is not a subject that is pursued when you first enter JC. Unlike H1 or H2 Chemistry, H3 Chemistry does not have a specified syllabus. Instead, students have a selection of different programmes to pick from. This includes either university undergrad modules or extended in-depth research.
Is there lab work in H1?
However, the depth of content in H1 for these topics is noticeably less. It should also be noted that there is no lab work and thus no SPA exam for H1 students. In contrast, H2 students have frequent practical sessions throughout their school calendar year.
Is heat a differential?
Heat, on the other hand, is an inexact differential. Knowing the initial and final states of a process is not enough information to tell you the heat transfer. Instead, the heat transfer depends on the particular path taken between the states. For a simple example of why this is important, consider a heat engine.
Is heat a function of enthalpy?
Enthalpy and heat are entirely different things. Enthalpy is a function of state. If you know the state of a system, you know its enthalpy. If you know the starting and ending states of a process, you can find the enthalpy change. Heat, on the other hand, is an inexact differential.
Is a heat engine a cycle?
The process is a cycle, meaning the initial and final states are the same, so a cycle of a heat engine has zero enthalpy change. However, the entire point is that the heat engine converts heat into work, so the heat exchange during a cycle is not zero.
Difference between E and H?
What is the difference between E and H? Are they like related, the same?
Re: Difference between E and H?
H = E + PV, so they are related, however they are not the same. Energy, E, is more convienent to use in constant volume processes because at constant volume it is just the heat. Enthalpy, H, is more convienent to use in constant pressure processes since at constant pressure, H is just the heat.
