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heat is defined as

• a transfer of thermal energy

• the total energy in all particles of an object

• the average kinetic energy in all particles of an object

• becoming more disordered as time passes

In a closed system, entropy always increases. This statement is known as ____.

• 0th law of thermodynamics

• 1st law of thermodynamics

• 2nd law of thermodynamics

• 3rd law of thermodynamics

In a closed system, energy cannot be created nor destroyed; it can only be transferred. This is known as _____.

• 0th law of thermodynamics

• 1st law of thermodynamics

• 2nd law of thermodynamics

• 3rd law of thermodynamics

Entropy is a measurement of how much order or disorder is in a closed system. The more _____; the _____ the entropy.

• ordered; higher

• disordered; higher

• disordered; lower

What's the name of this equipment?

• A polystyrene cup calorimeter

• A white cup

• A coffee cup

• A bomb calorimeter

In the lab, we use a styrofoam cup calorimeter to create a _____.

• closed system

• open system

• an environment to let energy flow freely

The specific heat of platinum is 0.133 J/g°C. How much heat(Q) is released when a 10 g piece of platinum cools from 100°C to 50°C?

• 66.5 J

• 665 J

• 0.0266 J

• 0.665 J

How much liquid water can you change 20 C if you apply 20,000 J?

• 500 g
• 100,000 g
• 250 g
• 350 g

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

• 0.016 C
• 1,500 C
• 62.5 C

• 0.4 C

The specific heat capacity (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 of copper?

• 12.82 °C
• 24.12°C
• 351 °C