What will the pressure of the gas be if the temperature rises to 87°C? A. 60 kPa
B. 161 kPa
C. 16 kPa
D. 41 kPa

answer: c. the experiment shows that the red substance experienced a chemical change.

explanation: chemical change is the change in which chemical composition of the substance changes. physical change is the change in which there is no change in chemical composition.

chemical changes are accompanied by following changes:

a) precipitate formation

b) energy is released or absorbed

c) formation of bubbles

d) change in color

as it is given that the red color has disappeared and there is production of gas, it means the red substance has undergone a chemical change.

e

d.) the average kinetic energy of the gas particles is greater in container b because its particles move faster.