Thermochemistry form 3

A(n) _____________ is a device for measuring temperature.

• thermometer
• barometer
• anemometer
• psychrometer 

A chemical reaction that absorbs heat from the surroundings is said to be __________ and has a __________ ΔH at constant pressure.

• endothermic; positive
• endothermic; negative
• exothermic; negative
• exothermic; positive

Tags

NGSS.HS-PS1-4

What kind of graph is this?

• endothermic
• exothermic

Tags

NGSS.HS-PS1-4

Which of the following is an example of an endothermic process or reaction?

• condensing

• freezing

• combustion

• melting

Which of the following is an example of an exothermic process or reaction?

• melting

• boiling

• photosynthesis

• freezing

True or false, in an endothermic process the energy of the products is more than the reactants.

• True

• False

True or false: The energy for bond breaking is less than energy from bond formation in an endothermic process.

• True

• False

True or False: There is more energy released during formation of bonds than the energy being absorbed for bond breaking in an exothermic reaction.

• True

• False

For an exothermic reaction, the $\Delta$  H for the reaction is a positive number.

• True

• False

Given: CH₄ + 2O₂ -----> CO₂ + 2H₂O + energy

The reaction is:

• endothermic, delta H is positive

• exothermic, delta H is negative

• endothermic, the delta H is negative

• exothermic, the delta H is positive