Which of the following assumptions appears reasonable for the isothermal process? h20 (liq, 1 bar) → h2o (liq, 1300 bar), t = 20°c. a. au = 0, ah 0 b. au = 0, ah 0 c. au #0, ah = 0 d. none of the above hinn nf diethyl ether using the chen's rule is

Answer : The assumptions appears reasonable for the isothermal process is, and

Explanation :

First law of thermodynamic : It states that the energy can not be created or destroyed, it can only change or transfer from one state to another state.

As per first law of thermodynamic,

The expression for internal energy is:

The expression for enthalpy is:

where,

= internal energy

q = heat

w = work done

n = number of moles

= specific heat capacity at constant volume

= specific heat capacity at constant pressure

= change in temperature

As we know that, the term internal energy and enthalpy is the depend on the temperature and the process is isothermal that means at constant temperature.

T = constant

= 0

So, at constant temperature the internal energy and enthalpy is equal to zero. That means,

and

answer

fusion: the energy source of stars. the energy released from the collapse of the gas into a protostar causes the center of the protostar to become extremely hot. when the core is hot enough, nuclear fusion commences. fusion is the process where two hydrogen atoms combine to form a helium atom, releasing energy.

hope it

assuming that your periodic table has eighteen columns, you should highlight   the four elements in the third column from the left of the table.

neutral atoms of elements after calcium contain d electrons. the energy of d orbitals of a particular main shell lies between the energy of the s and p orbitals of the next main shell. for example, electrons in the have energy higher than those in the orbital while lower than those of the orbital.

by the aufbau principle, electrons fill orbitals one at a time, starting from those of the lowest energy. the orbital is therefore filled right after orbitals and before orbitals.  

potassium has electron configuration and calcium . the s orbital of a main shell holds a maximum of two electrons. the next element would thus have the electron configuration and satisfy the requirements.

a neutral atom of the element contains three electrons on top of the most recent noble gas element. it should thus be placed in the third column of the periodic table. both scandium and yttrium would satisfy the conditions. an aufbau diagram indicates that the 4f orbital is filled before the 5d. however, it appears that exceptions exists for both lanthanum and actinium. neutral atoms of the two d-block elements also demonstrate the and should be highlighted as well.