Thermal Energy - Chem

The state of matter in which molecules are widely spaced is

• solid

• liquid

• gas

• elemental

• molecular

Which segment of the heating curve below illustrates when thermal energy is constant?

• 1

• 2

• 3

• 4

• Two of the above

Which segment of the heating curve below illustrates when thermal energy is increasing?

• 1

• 2

• 3

• 4

• Two of the above

Tags

NGSS.HS-PS3-4

A state of matter that has a definite volume and is relatively incompressible is a

• solid

• liquid

• gas

• all of the above

• two of the above

Tags

NGSS.MS-PS1-4

Which of the following has the highest average

kinetic energy?

• lead at 25*C

• Cold water at 21*C

• Hot water at 95*C

• A cool gas at 25*C

• A hot gas at 85*C

A sample of 0.0 °C ice was melted, warmed, and completely evaporates to 100 °C steam. Sketch a complete heating curve for water and determine how many segments of the curve this process undergoes

• 1

• 2

• 3

• 4

• 5

Tags

NGSS.HS-PS3-4

NGSS.HS-PS3-2

Which of the following changes is endothermic?

• water evaporates

• water freezes

• butane gas burns

• steam condenses

• none of the above

How many joules are required to raise the temperature of 1.074 g of iron from 25.1 °C to 100.0 °C?

(The specific heat of iron is 0.449 J/g • °C.)

• 36.1J

• -36.1J

• 0.036J

• -0.036J

• 0.449

Tags

NGSS.HS-PS3-1

What is the energy content of a 10 gram sample of a cheeto that was burned underneath a calorimeter. The calorimeter contains 75 grams of water, and the water warmed by 15 oC. After the cheeto finished burning, there were 2 grams leftover.

• 4703

• -4703

• 470

• 2351

• 588

Tags

NGSS.HS-PS3-4

NGSS.HS-PS3-1

A 250 g bar of aluminum at 23.8 °C has 15,500 J of heat added. What is the final temperature of the aluminum? (The specific heat of aluminum is 0.903 J/g • °C.)

• 23.8

• 83

• 92.5

• 68.7

• 44.9

Tags

NGSS.HS-PS3-1

NGSS.HS-PS3-2