What is chemical potential energy?

• Energy required to break chemical bonds
• Energy associated with temperature changes
• Energy released during a chemical reaction
• Chemical potential energy is the energy stored in the chemical bonds of a substance.

Tags

NGSS.HS-PS1-4

What law states, "In a chemical reaction energy is not created or destroyed?"

• Law of Conservation of Energy
• Law of Mass Conservation
• Law of Thermodynamics
• Law of Chemical Equilibrium

How many joules are there in 712.0 calories?

• 2552 joules

• 311 joules

• 170 joules

• 2979 joules

Which of the following substances has the highest specific heat?

• magnesium

• strontium

• concrete

• water

Use the formula  q= c x m x ∆T to calculate

• The quantity of moles

• Molality

• ∆G

• The amount of heat transferred from an object

Tags

NGSS.HS-PS3-4

When ΔH is positive, the reaction is

• endothermic

• exothermic

Tags

NGSS.HS-PS1-4

If you were to touch a flask that in which an endothermic reaction were occurring,

• The flask will feel cold.
• The flask will feel hot.
• The flask temperature will not change.

• The flask will feel warm.

Tags

NGSS.HS-PS1-4

Match the definition with the vocab word

• ∆H to make one mole from its elements

• Heat of formation

• ∆H to melt one mole

• Heat of fusion

• ∆H to burn one mole of a substance

• Heat of combustion

• ∆H to vaporize one mole of a substance

• Heat of vaporization

What is the standard enthalpy assigned to all elements in their standard state?

• 50 kJ/mol
• 0 kJ/mol
• -100 kJ/mol
• 25 kJ/mol

If the change in a system's free energy is positive, the reaction is

• non-spontaneous
• spontaneous