Asystem absorbs 12 j of heat from the surroundings; meanwhile, 28 j of work is done on the system. what is the change of the internal energy δeth of the system?

The value of change in internal energy of the system is, 40 J.

Explanation : Given,

Heat  absorb from the surroundings = 12 J

Work done on the system = 28 J

First law of thermodynamic : It is a law of conservation of energy in which the total mass and the energy of an isolated system remains constant.

As per first law of thermodynamic,

where,

= internal energy  = ?

q = heat  absorb from the surroundings

w = work done on the system

Now put all the given values in this formula, we get the change in internal energy of the system.

Therefore, the value of change in internal energy of the system is, 40J.

answer: atomic mass was originally used to arrange elements on the periodic table, but is no longer used to organize the modern version.

explanation:

originally atomic mass was used to arrange elements on the periodic table from left to right in a row. each column then shows similar properties of elements of a group.

in modern periodic table, the atoms are arranged in increasing atomic number. as atomic number represents the number of protons in an atom which is unique for every atom.