Define enthalpy.

• The opposite of temperature

• The temperature of molecule

• The energy stored in the movements of the molecules

• The internal energy and the product of pressure and wave

Tags

NGSS.HS-PS3-2

What is the Law of Conservation of Energy?

• Energy is equal to reactants and products

• Energy can be created nor destroyed

• Energy is used up but it can be replenish

• Energy is conserved and preserved

Tags

NGSS.HS-PS3-2

A process where the system absorbs heat from the surroundings.

• Exothermic Reaction

• Endothermic Reaction

• Enthalpy

• Entropy

Tags

NGSS.HS-PS1-4

Study the reaction below. Is it exothermic or endothermic?

H₂ + Cl₂ --> 2 HCl + 1845 kJ

• Exothermic Reaction

• Endothermic Reaction

Tags

NGSS.HS-PS1-4

How do you calculate the Enthalpy of Reaction?

• ΔH = ΔH_products - ΔH_reactants

• ΔG = ΔH -TΔS

• ΔT = q / mC

• E = mc²

Tags

NGSS.HS-PS1-4

A solute dissolves in water and gets cold.

• Exothermic with positive ΔH

• Exothermic with negative ΔH

• Endothermic with positive ΔH

• Endothermic with negative ΔH

Tags

NGSS.HS-PS1-4

The SI unit of energy.

• Calorie

• calorie

• Joules

• enthalpy

ΔH value in an endothermic reaction is negative.

• True

• False

Tags

NGSS.HS-PS1-4

According to the Particles Theory of Matter, one particle has the ability to vibrate within their mean position if added with heat. Which of the following is the statement referring to?

• Solid

• Liquid

• Gas

Tags

NGSS.HS-PS3-2

NGSS.HS-PS3-4

H₂ + ½ O₂ --> H₂O + 285kJ is an example of a(n)

• Electrical equation

• Thermodynamical equation

• Thermochemical equation

Tags

NGSS.HS-PS1-4