1. Which of the following is a direct cause of a substance’s temperature increase? (1 point). Energy is removed from the particl
es of the substance.. Kinetic energy is added to the particles of the substance.. The number of atoms and molecules in a substance changes.. The volume of the substance decreases.. 2. As the temperature of a substance increases, its volume tends to increase due to (1 point). . thermal equilibrium.. thermal energy.. thermal expansion.. thermal contraction..
1. When temperature of a substance is increased, it is actually caused by the increase in the kinetic energy of the particles of the substance. The particles vibrate more rigorously. Average kinetic energy of a gas is proportional to temperature:
K.E. =0.5 kT²
thus, option b is correct.
2. As the temperature increases, the substance undergoes thermal expansion. Thus, the volume increases.
