Three moles of an ideal gas with heat capacity at constant pressure (21J/mol/K) and of initial pressure of 100 atm and temperature of 1130K. The gas was suddenly allowed to escape into the amosphere at a constant pressure of 1 atm .For this reversible adiabatic change , calculate change in internal energy and change in enthalpy.​

•hydration •dissociation •dissolving which one goes to which

The image compares the arrangement of electrons in two different neutral atoms. a figure labeled atom q has a shaded sphere at the center of three concentric circles. the innermost circle has two black spheres. the middle circle has six black spheres. to the left of this figure is another figure labeled atom p. atom p has a shaded sphere at the center of three concentric circles. the innermost circle has two black spheres. the middle circle has seven black spheres. which of the following best explains the position of the two atoms in the periodic table?

Ajar contains a certain substance. which observation would show that the substance must be either a solid or a liquid?