Unit 3 Energy and Particles in Motion Honors Chem Exit Quiz

Unit 3 Energy and Particles in Motion Exit Quiz

Let's see what you have learned in this unit !!!

Multiple Choice

True or false: In a perfectly closed system, the energy (Q) released by the burning food will equal the energy absorbed by the water

• True

• False

Multiple Choice

In the proceess shown here, the system is _______________ energy while the surroundings become ________________.

• losing, warmer

• gaining, warmer

• gaining, cooler

• losing, cooler

Multiple Choice

In the equation Q=m x c x ΔT, the "c" stands for the material's

• temperature

• mass

• specific heat capacity

Multiple Choice

Water has a really high specific heat capacity (c). These means that....

• it takes very little energy to make water temperature rise.

• it takes much energy for the temperature for water to rise

Multiple Choice

Water has a high specific heat capacity due to....

• its density

• its color

• the attractive forces between water molecules

• none of these

Multiple Choice

You want to calculate the energy (Joules) required to bring 25 g of ice at -15°C to a liquid at 75°C. Which equation(s) should you use?

• Q= m x c_ice x ΔT

• Q= m x c_ice x ΔT and

  Q= m x H_fusion

• Q= m x c_ice x ΔT

  Q= m x H_{fusion and}

  Q= m x c_water x ΔT

• none of these

Multiple Choice

This is a table of specific heat capacity for some substances. Which heats up the quickest?

• water

• wood

• lead

Multiple Choice

In this diagram, the mass of the system, indicated by the line, is undergoing a(n) _________ as energy enters the system.

• exothermic change

• endothermic change

Multiple Choice

In this exothermic reaction, the surroundings become _____________ over time while the system (the mass shown by the line) becomes _________.

• warmer, warmer

• cooler, warmer

• warmer , cooler

• cooler, cooler

Multiple Choice

What of the following is/are true at segment D in the graph of water shown to the left?

• evaporating going left to right

• condensing going right to left

• no temperature change occurs

• all choices are correct

Open Ended

How is water's high specific heat capacity critical to the regulation of Earth's climate?