CHEM Sem 2 Unit 6 Exam Review

Temperature is the measure of

• Average kinetic energy or movement of the particles in a substance.
• kinetic energy associated with the random motion of atoms and molecules.
• the transfer of energy from one substance to another and is measured in joules.

_________ depends on the mass of the substance.

• Heat
• Temperature
• Specific Heat

Which of the following correctly depcits the variable for heat and its unit of measure?

• T; s
• q; J
• m; g
• H; J*C

Kinetic energy is energy in motion whereas potential energy is ______

• energy in sudden motion
• measured in grams
• recycled energy
• stored energy

Select all that is true about heat capacity, C:

• the quantity of heat a system absorbs or releases when it experiences a temp change of 1*C.
• Depends on type and amount of substance that absorbs or releases heat.
• c=q/ΔT
• quantity of heat required to raise the temperature of 1g of a substance by 1*C.

Which of the following correctly describes what specific heat capacity is?

• The quantity of heat required to raise the temp of 1 gram of a substance by 1*C.
• The quantity of heat a system absorbs or releases when it experiences a temp change of 1*C.
• The measure of kinetic energy or movement of the particlaes in a substance.
• The transfer of heat energy from one substance to another,

At which part of a heat curve will you use enthalpy of vaporization to calculate the energy required to induce a phase change?

• On the flat, zero slope/"plateau", at 0*C.
• On the flat, zero slope/"plateau" at 100*C.
• On the nonzero slope in liquid state.
• On the nonzero slope at solid state.

Which of the following is true regarding endothermic reactions? Select all that apply.

• The system absorbs heat from its surroundings.
• Kinetic energy is converted into potential energy and seems to dissappear.
• The potential energy of the system increases.
• The sytstem releases heat into its environment.

Which of the following is true regarding exothermic reactions? Select all that apply.

• The system releasese heat into its environment.
• The energy is more in the products than the reactants.
• The overall change in enthalpy is negative.
• The system goes from having high potential energy to low potential energy.

Which of the following is NOT an example of exothermic reactions? Select all that apply.

• Freezing
• Condensation
• Combustion
• Vaporization