Thermochemistry Review

What is the difference between conduction, convection, and radiation?

• Conduction is heat transfer through direct contact, convection is heat transfer through fluid movement, and radiation is heat transfer through electromagnetic waves.

• Conduction is heat transfer through fluid movement, convection is heat transfer through direct contact, and radiation is heat transfer through sound waves.

• Conduction is heat transfer through electromagnetic waves, convection is heat transfer through direct contact, and radiation is heat transfer through fluid movement.

• Conduction is heat transfer through sound waves, convection is heat transfer through electromagnetic waves, and radiation is heat transfer through direct contact.

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What is the significance of the first law of thermodynamics in thermochemistry?

• It states that energy can be created and destroyed.

• It states that energy cannot be created or destroyed, only transformed from one form to another.

• It states that energy is always lost in chemical reactions.

• It states that energy can only be transformed into heat.

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What is the formula for calculating thermal energy change?

• Q = mc∆t

• Q = m∆t

• Q = mc^2

• Q = mgh

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What is the process of heat transfer that involves waves in space?

• Conduction

• Convection

• Radiation

• Insulation

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What is the transfer of energy between solids by direct contact called?

• Convection

• Radiation

• Conduction

• Insulation

How does the concept of heat capacity relate to specific heat?

• Heat capacity is the total heat required to change the temperature of an object, while specific heat is the heat capacity per unit volume.

• Heat capacity is the amount of heat required to change the temperature of an object, while specific heat is the heat capacity per unit mass.

• Heat capacity and specific heat are the same concepts and can be used interchangeably.

• Heat capacity is the heat required to change the temperature of a substance, while specific heat is the heat required to change the temperature of a gas.

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What does temperature measure in terms of molecular motion?

• Potential Energy

• Kinetic Energy

• Thermal Energy

• Chemical Energy

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How do you calculate the change in temperature when energy is added to a substance?

• Use the formula Q=mc∆t.

• Use the formula E=mc².

• Use the formula F=ma.

• Use the formula P=IV.

What is the change in temperature when 50,000 Joules of energy is added to 200 grams of water at 25 C?

• 50 C

• 63 C

• 75 C

• 80 C

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What is an example of radiation in everyday life?

• The heat from the sun warming your skin

• The sound of a ringing phone

• The smell of freshly baked bread

• The taste of sweet chocolate

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