Thermodynamics and Entropy

A reaction that releases energy is

• Exothermic

• Endothermic

• Could be either

Tags

NGSS.HS-PS1-4

A reaction that absorbs energy is

• Exothermic

• Endothermic

• Could be either

Tags

NGSS.HS-PS1-4

The measure of disorder in a system is

• entropy

• enthalpy

• exothermic

• endothermic

A reaction in which a solid turns into a liquid is

• endothermic and increases entropy

• endothermic and decreases entropy

• exothermic and increases entropy

• exothermic and decreases energy

2MgO ---> 2Mg + O₂ is a reaction with

• An increase in entropy

• A decrease in entropy

• more information is needed to determine the entropy

CH₄(g) + 2O₂(g) → CO₂(g) + 2H₂O(l) + 890.3 kJ/mol is

• exothermic

• endothermic

• more info is needed

H₂(g) + I₂(g) →2HI(g) ∆H = +26.5 kJ/mol is

• exothermic

• endothermic

• more info is needed

What requires a larger activation energy?

• endothermic reactions

• exothermic reactions

• It varies

Look at the energy diagram on the board

• exothermic

• endothermic

Look at the energy diagram on the board

• increase in entropy

• decrease in entropy