Themochemistry

What kind of graph is this?

• endothermic
• exothermic
• both
• neither

Tags

NGSS.HS-PS1-4

In a chemical reaction, the difference between the potential energy of the products and the potential energy of the reactants is the...

• free energy
• heat of reaction
• heat of fusion
• activation energy

Tags

NGSS.HS-PS1-4

Which of the letters (A-D) represents activation energy?

• A
• B
• C
• D

Tags

NGSS.HS-PS3-1

Which of the letters (A-D) represents the potential energy of the reactants?

• A
• B
• C
• D

Tags

NGSS.HS-PS1-4

What kind of reaction is this?

• endothermic

• exothermic

Tags

NGSS.HS-PS1-4

Consider the reaction: 2 H₂O + energy --> 2H₂ + O₂

• exothermic, releasing energy
• exothermic, absorbing energy
• endothermic, absorbing energy
• endothermic, releasing energy

Tags

NGSS.HS-PS1-4

C+ O₂ --> CO₂ + 60kJ, what is the value for ΔH for the reaction?

• +60
• -60
• there is no way to know

Tags

NGSS.HS-PS1-4

Calculate the enthalpy of the following reaction:
Ca(OH)₂ -> CaO + H₂O
ΔHf in kJ/mol:  
      Ca(OH)₂  -983.2
        CaO         -634.9
        H₂O         -285.5

• 62.8 kJ
• -62.8 kJ
• -1840.6
• 1840.6

Tags

NGSS.HS-PS1-4

During an endothermic reaction in a beaker if we are part of the surroundings and touched the beaker, it would feel _______.

• Warm

• Cold

• Bubbly

• Damp

Tags

NGSS.HS-PS1-4

NGSS.HS-PS3-4

H₂ + Cl₂ --> 2 HCl + 1845 kJ
Is this reaction endothermic or exothermic?

• Endothermic 
• Exothermic

Tags

NGSS.HS-PS1-4

NGSS.HS-PS3-1