Ammonia

Carbon dioxide

Sulphur dioxide

R-12

cooling

heating

dehumidifying

all of these

0

0.5

0.75

1

In conduction, reduction in the thickness of the material and an increase in thermal conductivity.

In convection, stirring of the fluid and cleaning the heating surface.

In radiation, increasing the temperature and reducing the emissivity.

all of the above

-1/3

-2/3

1

-1