Thermochemical Equations

Classify the reaction: NO_{2 (g)}--> NO _(g) + 1/2 O_2(g)

• endothermic

• exothermic

• no reaction

• not applicable

Tags

NGSS.HS-PS1-4

Determine the H for reaction of this equation: 3C (graphite) + 4 H2(g) --> C3H8(g)

• -683.4 kJ

• -2899.2 kJ

• -1324.7 kJ

• -104.0 kJ

Tags

NGSS.HS-PS1-4

NGSS.HS-PS3-1

A reaction is performed in a beaker with a temperature probe recording the temperature changes of the reaction.  If the temperature began at 15.0 degrees Celsius and ended at 27.5 degrees Celsius.  If the reaction is our system, is the system endothermic or exothermic?

• Exothermic

• Endothermic

Tags

NGSS.HS-PS1-5

NGSS.HS-PS3-4

For Hess' Law to be used what must be the same for all of the reactions being studied?

• The initial conditions of pressure and temperature.

• The final conditions of pressure and temperature.

• The initial and the final conditions of pressure and temperature.

• The initial and the final conditions of pressure and temperature, and the number of moles of reactants.

What is the Delta H if you reverse the reaction.

• 86 kJ

• - 86 kJ

• 68 kJ

• -68 kJ

Tags

NGSS.HS-PS1-4

The Equation for this reaction is:

• C + O₂ + 393 kJ→ CO₂

• C + O₂ → CO₂ + 393 kJ

• C + O₂ + 393 kJ→ CO

• C + O₂  + 110 kJ → CO

Tags

NGSS.HS-PS1-4

Tags

NGSS.HS-PS1-4

Tags

NGSS.HS-PS1-4

NGSS.HS-PS3-1

Tags

NGSS.HS-PS1-4

NGSS.HS-PS3-1

Tags

NGSS.HS-PS1-4

NGSS.HS-PS3-1

NGSS.HS-PS3-4