Thermochemistry and Kinetics

Have you ever eaten sherbet sweets? They fizz in your mouth and your tongue feels cold. Why do you think that is?

• It is an exothermic reaction

• It is an endothermic reaction

• It is made of ice

• It is dissolving your mouth

Tags

NGSS.HS-PS1-4

Which statement is correct about exothermic reaction?

• The heat absorbed during bond breaking is more than the heat released during bond formation

• The heat absorbed during bond breaking is less than the heat released during bond formation

• The heat absorbed during bond breaking is equal to the heat released during bond formation

• No heat is absorbed or released during bond breaking and bond formation

Tags

NGSS.HS-PS1-4

The reaction between nitrogen and oxygen can be represented by the following equation:

Which of the following energy level diagrams represent the above reaction?

• 
• 
• 
• 

Tags

NGSS.HS-PS1-4

Cake baking is

• endothermic

• exothermic

Tags

NGSS.HS-PS1-4

NGSS.HS-PS3-4

When thermal energy is added to a substance, the substance's particles move:

• More rapidly at an increased diestance from each other.

• More rapidly with less distance between each other.

• More slowly with a greater distance between each other.

• More slowly with a reduced distance between each other.

Tags

NGSS.HS-PS3-2

NGSS.HS-PS3-4

The specific heat(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?

• 12.82 °C

• 24.12°C

• 351 °C

Tags

NGSS.HS-PS3-1

A slower particle has a lower energy than an identical, faster particle.

• True

• False

Tags

NGSS.HS-PS3-2

The transfer of thermal energy between objects of different temperatures is called...

• temperature

• heat

• internal energy

• none of these

Tags

NGSS.HS-PS3-4

Thermal energy always moves:

• From a high temperature object to a lower temperature object.

• From a lower temperature object to a higher temperature object.

• From an object with lower kinetic energy to an object with higher kinetic energy.

• From an object of higher mass to an object of lower mass.

Tags

NGSS.HS-PS3-4

The first law of thermodynamics states that energy is

• created

• destroyed

• conserved

• created and destroyed

Tags

NGSS.HS-PS3-2