Answer
a. Physical Change
b. Chemical Change
c. Physical Change
Work Step by Step
a. The substance in the liquid form in the lighter converted into gas form. Since no new substance was formed, it is a Physical Change.
b. The substance in the lighter combusted in the presence of oxygen, forming new substances such as Carbon Dioxide; therefore, it is a Chemical Change.
c. Water molecules converted from liquid form into gas form when reaching the boiling temperature; therefore, it is a Physical Change.
