Substance X is known to exist at 1 atm in the solid, liquid, or vapor phase, depending on the temperature. Additionally, the values of these other properties of X have been determined: Melting point 5°C
Enthalpy of fusion 9.00 KJ/mol
Density 2.40 g/cm^3
1.80 g/ml

Boiling point 65°C
Enthalpy Of vaporization 23.00 KJ/mol
Heat capacity 38 J. K^-1 mol^-1
28 J. K^-1 mol^-1
64 J. K^-1 mol^-1

You may also assume x behaves as an ideal gas in the vapor phase. Suppose a small sample of X at —20°C is put into an evacuated flask and heated at a constant rate until 10.0 kJ/mol of heat has been added to the sample.

Requried:
Graph the temperature of the sample that would be observed during this experiment.

acid rain does not usually kill trees directly. instead, it is more likely to weaken the trees by damaging their leaves, limiting the nutrients available to them, or poisoning them with toxic substances slowly released from the soil. the main atmospheric pollutants that affect trees are nitrates and sulphates.

in the analysis of systems that involve fluid flow, we frequently encounter the combination of properties u and pv.

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.