contestada

Black ice is a thin layer of water on a sidewalk or road that has rozen after the temperature has dropped below freezing its called black ice because the ice-s nearly ms ble especially when driving in a car at night. Which of the following statements is true?
View Available Hint(s)
A) Black ice is neither a chemical change nor a physical change
B) Black ice is an example of a physical change
C) Black ice is an example of a chemical change
D) Black ice is both a chemical change and a physical change

Respuesta :

ysabayomi

Answer:

The correct option is B

Explanation:

There are two changes in chemistry; physical and chemical change.

A physical change is generally characterized by the following properties

  • No new substance is formed
  • They are easily reversible
  • They cannot be represented with a chemical reaction
  • example includes burning of candle wax

A chemical change is generally characterized by the following properties

  • New substances are formed
  • They are not easily reversible
  • They can be represented with a chemical reaction
  • example includes rusting of iron

The question states that the water on the sidewalk or a road is been converted to ice as a result of a decline in temperature and this can be reversed when the temperature increases. From the properties highlighted earlier, this process is a physical change because of the following reasons

  • No new substance is formed as water in its solid state is ice
  • This can be easily reversible with a change in temperature
  • This reaction does not require a chemical reaction as it is just water (H2O) in different states (solid and liquid).
Eduard22sly

Answer: option B. Black ice is an example of a physical change

Explanation:

Otras preguntas