At a pressure of 1 atm, what is ^h in kj for the process of condensing a 42.5g sample of gaseous benzene at its normal boiling point of 80.1•c given c6h6 boiling point 80.1 ^hvap: 30.7 specific heat: 1.74

-17.2 kJ

Step-by-step explanation:

For the process of vaporization,

C₆H₆(ℓ) ⇌ C₆H₆(g), ΔH(vap) = 30.7 kJ·mol⁻¹

For the process of condensation,

C₆H₆(g) ⇌ C₆H₆(ℓ), ΔH(cond) = -30.7 kJ·mol⁻¹

(a) Moles of benzene

n = 42.5 g × (1 mol/78.11 g)

  = 0.5441 mol

(b) Heat evolved

q = nΔH

  = 0.5441 mol × (-31.7 kJ/1 mol)

  = -17.2 kJ

For the condensation, ΔH = -17.2 kJ.

a pan containing water is placed in a positio n where it is exposed to a 10 mile per hour wind. the pan contains a uniform depth of 1.27 cm of water, is quite wide, and has a length of 2.44 m in the wind direction. the water in the pan is at a constant temperature of 15.5 °c.

each chemical family is represented as a group or column on the periodic table. based on chemical properties, there are 6 types of chemical families. group 1 represents alkali metals, group 2 represents alkaline earth metals, groups 3 to 12 represent transition metals, groups 13 to 16 represent non-metals and other metals, group 17 represents halogens and group 18 represents noble gases.