How many kJ of energy are required to force 175 g of ice at -25°C to turn into steam at 113°C? Use 18.0 g/mol for the molar mass of water. *
ΔΗ0
fusion
= 6.01 kJ/mol
ΔΗ. = 40.7 kJ/mol
vapor
CH20(s) = 2.03 J/g°C
CH200 = 4,184 J/gºC
CH2O(g) = 2.01 J/gºC
Water freezes at 0°C and boils at 100°C.

qualitative observation deals with data that can be observed with our senses: sight, smell, touch, taste, and hearing. they do not involve measurements or numbers. for instance, colors, shapes, and textures of objects are all qualitative observations.

the seeing the electronic configuration we can say that the element is fluorine.

fluorine is the most electronegative element in the periodic table.

but by only seeing the configuration we cannot say about its reactivity because we don't know if its configuration after excitation or by addition of electrons.

but if not then, it is the lightest halogen and exists as a highly toxic pale yellow diatomic gas at standard conditions. as the most electronegative element, it is extremely reactive: almost all other elements, including some noble gases, form compounds with fluorine.