B. Match each term to its description or definition. (4 points) (3.3.5 Practice: Transferring Energy, Question 1: Thermodynamics

ANSWERS
F. Specific heat
Heat required to raise 1 g of a substance 1°C
A. Heat
The transfer of thermal energy between objects
H. Entropy
A measure of the randomness in a system
C. Conduction
Heat transfer through direct contact between molecules
G. Enthalpy
Heat given off or absorbed in a reaction
E. Radiation
Heat transfer by way of electromagnetic waves
B. Thermal energy
Total kinetic energy of all molecules in a system
D. Convection
Heat transfer through movement of liquids or gases

hydrocarbons are organic compounds that contain only hydrogens and carbons. they can be saturated (those which contain only carbon-carbon single bonds) or unsaturated (those which contain carbon-carbon double or triple bonds) in nature. hydrocarbons can undergo several reactions like substitution, elimination etc.  

on substituting one or more hydrogen atoms in hydrocarbon it results in the formation of haloalkane. as the halogen atoms are large compared to the carbon and hydrogen atoms, due to which the molecular weight increases and the bond become polar because of presence electronegative halogen atom and results in the increase in boiling point of the haloalkane.

thus, the correct option is (b) that is the boiling point of the new compound increases on substituting a hydrogen atom with a halogen in a hydrocarbon.

points

explanation:

ca has a crystalline lattice with positive ions (since it is a metal, metals are positively charged) and electrons flow freely in its structure since the ca atoms have a large nuclear radius so the electrons are not tightly held, therefore the electrons can flow freely since they are not being highly attracted by the nucleus. moreover, one of the properties of metals are that they are conductors of electricity, thus proving ca is the element.