Calculate the final Temperature (Kelvin) required to change the volume of 100 L of Helium at 256 K to 150 L, assuming the pressure is constant.

T = 384 K

Explanation: For this problem we will use Charles Law for gases. The formula is expressed as the ratio of volume per unit temperature having a constant pressure.

V1 / T1 = V2 / T2 derive to find the new Temperature T2

T2 = V2 T1 / V1

= 150 L ( 256 K ) / 100 L

= 384 K

Cancel out the units of Liters so the remaining unit is in Kelvin.

substituting a hydrogen atom with a halogen in a hydrocarbon:

- the single bond remains single. a is wrong.

- the bond with hydrogen is as strong as with a halogen. c is wrong

- a hydrocarbon is saturated if there is no double bond. we do not know that so d is wrong.

- carbon will always have four valence electrons. e is wrong.

by elimination, the correct answer is b. the boiling point of the new compound increases.