Thermochemistry & Nuclear Chemistry Review

Thermochemistry & Nuclear Chemistry Review

Multiple Choice

______________ is the average kinetic energy of particles.

• Temperature

• thermal rate

• reaction rate

• kinetic force

Multiple Choice

If kinetic energy increases, ____________ will also increase?

• Temperature

• acidity

• basicity

Multiple Choice

A 24.0 gram sample of copper was heated from 25.0^oC to 500.0^oC, 4378J of heat were absorbed, what is the specific heat of copper?

• .384

• 49909200

• 2.60

• 8.77

Multiple Choice

What kind of energy is in a moving skateboard?

• Potential
• Kinetic
• Both potential and kinetic energy
• none of the above

Multiple Choice

The specific heat(c) of copper is 0.39 J/g °C. What is the temperature change(∆t) when 100 Joules of heat(Q) is added to 20 grams?

• 12.82 °C

• 24.12°C

• 351 °C

Multiple Choice

How much heat does an aluminum block absorb if 10.00 grams is heated from 25.0^oC to 50.0^oC? the specific heat of aluminum is .900J/g^oC

• 450

• -450

• 225

• -225

Multiple Choice

Define 'Enthalpy'

• a) Energy stored in the movement of molecules in a substance
• b) The opposite of temperature
• c) The temperature of a molecule
• d) Energy stored in the chemical bonds in a substance

Multiple Choice

ΔH value in an endothermic reaction is a positive number.

• True
• False

Multiple Select

Kinetic energy is the energy of motion.

• True

• False

Multiple Select

Potential energy is stored energy.

• True

• False

Multiple Choice

The amount of heat energy required to change the temperature of 12 g of gold from 45°C to 15°C is -47 J. What is the specific heat capacity of gold?

• 0.13 J/(g°C)

• 17,000 J/(g°C)

• 1600 J/(g°C)

• 0.065 J/(g°C)

Multiple Choice

Define 'Enthalpy'

• a) Energy stored in the movement of molecules in a substance

• b) The opposite of temperature

• c) The temperature of a molecule

• d) Energy stored in the chemical bonds in a substance

Multiple Choice

A measure of the average kinetic energy of a substance.

• heat
• temperature
• enthalpy
• entropy

Multiple Choice

If the enthalpy (ΔH) is negative the reaction is ____.

• Endothermic

• Exothermic

• Neutral

Multiple Choice

Two or more nuclei combine to form one larger nucleus in the process of nuclear _____.

• Fusion
• Fission
• Tracing
• Decay

Multiple Choice

A nuclear reaction where a nucleus splits into two smaller nuclei is... 

• Fission
• Fusion
• Gamma decay
• Beta decay

Multiple Choice

What is another name for an alpha particle?

• electron
• x-ray
• hydrogen nucleus
• helium nucleus

Multiple Choice

The least penetrating form of radiation is...

• alpha
• beta
• gamma
• neutron

Multiple Choice

The charge on a gamma particle is...

• -1
• 0
• +1
• +2

Multiple Choice

What particle completes this reaction?

• alpha particle
• beta particle
• gamma particle
• neutron

Multiple Choice

What is the change in atomic mass when an atom emits a neutron?

• 0
• +1
• -1
• -2