Unit 4 Week 1: Heat Intro Review

Which sample will always take the shape and completely fill its container?

• H₂O(s)

• H₂O(l)

• H₂O(g)

• H₂O(aq)

Tags

NGSS.MS-PS1-4

The average kinetic energy of the particles in a sample of matter is expressed as

• density

• volume

• pressure

• temperature

Tags

NGSS.HS-PS3-2

NGSS.HS-PS1-5

Which temperature change indicates an INCREASE in the average kinetic energy of the molecules in a sample?

• 288 K to 298 K

• 310 K to 273 K

• 305 K to 273 K

• 355 K to 298 K

Tags

NGSS.HS-PS3-2

What best represents this change:

I₂(s) → I₂(g)

• endothermic chemical change

• endothermic physical change

• exothermic chemical change

• exothermic physical change

Tags

NGSS.HS-PS3-4

Given the balanced equation representing a reaction:

CH₄(g) + 2O₂(g) → 2H₂O(g) + CO₂(g) + heat

• The reaction is exothermic because it releases heat

• The reaction is exothermic because it absorbs heat

• The reaction is endothermic because it releases heat

• The reaction is endothermic because it absorbs heat

Tags

NGSS.HS-PS1-4

A student observed that a test tube felt COLDER when a sample of NH₄Cl(s) is dissolved in 5.0 mL of water. What best describes the heat flow & classification of the process?

• Heat flows from the test tube to the hand; endothermic

• Heat flows from the test tube to the hand; exothermic

• heat flows from the hand to the test tube; endothermic

• heat flows from the hand to the test tube, exothermic

Tags

NGSS.HS-PS3-4

What Kelvin temperature is equal to 37^oC?

• -236 K

• 236 K

• 273 K

• 310 K

What occurs when a 35-gram aluminum cube at 85°C is placed in water at 25°C?

• Heat is transferred from the aluminum to the water, and the temperature of the water decreases.

• Heat is transferred from the aluminum to the water, and the temperature of the water increases.

• Heat is transferred from the water to the aluminum, and the temperature of the water decreases.

• Heat is transferred from the water to the aluminum, and the temperature of the water increases.

Tags

NGSS.HS-PS3-4