Calorimeter and Heat Transfer Problems

A student using a Styrofoam cup as a calorimeter added a piece of metal to distilled water and stirred the mixture as shown in the diagram. The student's data is shown in the table. Which statement correctly describes the heat flow in calories? (Ignore heat gained or lost by the calorimeter.)

• The water lost 1360 calories of heat and the metal gained 140 calories of heat.

• The water lost 350 calories of heat and the metal gained 350 calories of heat.

• The water gained 1360 calories of heat and the metal lost 140 calories of heat.

• The water gained 350 calories of heat and the metal lost 350 calories of heat.

The diagrams shown represents two solids and the temperature of each. What occurs when the two solids are placed in contact with each other?

• Heat energy flows from solid A to solid B.

• Heat energy flows from solid A to solid B. Solid A increases in temperature.

• Heat energy flows from solid B to solid A. Solid B decreases in temperature.

• Heat energy flows from solid B to solid A.

Two samples of gold that have different temperatures are placed in contact with one another. Heat will flow spontaneously from a sample of gold at 60°C to a sample of gold that has a temperature of (a)   .

• 50°C
• 60°C

• 70°C

• 80°C

Which term represents a form of energy?

• heat

• degree

• kilocalorie

• temperature

When a chemical bond is broken, energy is ​ (a)   .

• only released
• neither absorbed nor released

• only absorbed
• both absorbed and released

Which form of energy is converted to thermal energy when propane burns in air?

• electromagnetic

• nuclear

• electrical

• chemical

The temperature of a sample of water changes from 10°C to 20°C when the sample absorbs 418 joules of heat. What is the mass of the sample?

• 1 g

• 10 g

• 100 g

• 1000 g

How many joules of heat are absorbed to raise the temperature of 435 grams of water at 1 atm from 25°C to its boiling point, 100°C?

• 4.5 x 10⁴ J

• 1.4 x 10⁵ J

• 2.5 x 10⁷ J

• 7.4 x 10⁷ J

As a 15.1-gram sample of a metal absorbs 485.7 J of heat, its temperature increases 25.0 K. What is the specific heat capacity of the metal?

• 0.129 J/g•K

• 1.95 J/g•K

• 3.23 J/g•K

• 7.74 J/g•K

The temperature of 15 grams of water increased 3.0 °C. How much heat was absorbed by the water?

• 5.0 calories

• 12 calories

• 18 calories

• 45 calories