Answer:
Explanation:
Entropy is the thermal energy that is unavailable for humans to do useful work.human system normally progress from disorder to order. This entropy interferes with humans day to day activities. Once this energy is consumed it is converted from one form to another and it is the tax paid for those energies. It is the continuous dissipation of energy. For example if 1000J of energy is consumed, and nature take part of it, 900J is available for work.
Boiling points.............
Answer:
Quantum mechanical atomic model.
Explanation:
The first model of electronic configuration was given by Bohr's model.
The most accurate model of electronic configuration is the quantum mechanical atomic model.
Bohr's model has various limitations:
1. It does not explain the Zeeman effect and stark effect.
2. It is not valid for multi-electron system.
3. Heisenberg uncertainty principle is not followed by this model
The quantum mechanical atomic model explains all the four quantum numbers for the electronic configuration of an atom in the periodic table.
The quantum mechanical atomic model considered the Heisenberg uncertainty principle.
Answer:
a) Mg and S = atoms
b) H2 SO3 = molecules
c) HBr =molecule
Explanation:
Step 1: Data given
Atoms = An atom is the smallest constituent unit of ordinary matter that constitutes a chemical element. We can find them on the periodic table.
Molecules = A molecule is an electrically neutral group of two or more atoms held together by chemical bonds.
a. Mg S = Magnesium and sulfur both are atoms, we both can find them on the periodic table
b. H2 SO3 = H2 is a molecule that contains 2 hydrogen atoms
SO3 is a molecule that contains 1 sulfur atoms and 3 oxygen atoms
c. HBr = HBr is a molecule that contains 1 hydrogen and 1 bromine atom
