Thermodynamic

A chemical change that absorbs energy is known as a(n) ____________ reaction.

• exothermic
• endothermic
• redox

If the enthalpy (ΔH) is negative, the reaction is ____.

• Endothermic
• Exothermic
• Neutral

Tags

NGSS.HS-PS1-4

If ΔH is positive, heat energy would be shown on the _____ side of the equation.

• reactant
• product

Tags

NGSS.HS-PS1-4

An exothermic reaction would show energy as a _________ in the chemical equation.

• reactant
• product

All of the following are units used for enthalpy (ΔH) except:

• Joules
• Kilocalories (kcal)
• Newtown (N)
• kJ/mol

Where does the energy released in a chemical reaction come from?

• It is created.
• It comes from the kinetic energy of the moving particles.
• It comes from the potential energy stored in chemical bonds.

Tags

NGSS.HS-PS1-4

If a reaction is endothermic, the potential energy stored in the reaction's products is ________ than the reactants.

• more
• less

If a reaction has a ΔH of 56 kJ/mol, energy will be written on the ____________ side of the equation.

• reactant
• product

Tags

NGSS.HS-PS1-4

If a reaction has a ΔH of -56 kJ/mol, energy will be written on the ____________ side of the equation.

• reactant
• product

When bonds form energy is

• absorbed.
• released.