Directions: Modified true or false. Write TRUE if the statement is correct. If FALSE, change the underlined word
or phrase to make the statement correct.
_______________1. When temperature increases, the motion of particles become slower.
_______________ 2. An object that has a greater mass, but lower temperature can transfer lesser heat than an object of
lesser mass but higher temperature.
Sample Problem: Imagine 100 g of an acid was mixed with 100 g of an alkali, which resulted in
the temperature increase from 24 degrees C to 32 degrees C. How much heat was absorbed?
Mass = m = 100 g + 100 g / 1000 g per kg = 0.2 kg
Specific heat capacity of water = c = 4,186 J/kg ْC
Change in temperature = ΔT = final temperature of 32 ْC - initial temperature of 24 ْC = 8 ْC
Q = (0.2 kg) (4,186 J/kg ْC) (8 ْC )
Q = 6,688 J, which means 6,688 joules of heat was absorbed.
______________ 3. Thermal energy moves from an area of higher temperature to an area of lower temperatures.
______________ 4. Convection is a type of heat transfer which involves direct contact.
______________ 5. Absorbed heat cause objects to expand.
______________ 6. Released heat cause objects to shrink.
______________ 7. Heat is the amount of thermal energy in an object.
______________ 8. Higher potential energy causes particles to move faster.
______________ 9. Specific heat capacity is the amount of heat required to raise the temperature of a substance per unit
of volume.
______________ 10. Heat absorbed or released can cause changes in the phase of substances