Thermo Chemistry

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

• Electrical equation

• Heat equation

• Thermochemical equation

Tags

NGSS.HS-PS1-4

If the enthalpy ter (ΔH) is negative the reaction is ____.

• Endothermic

• Exothermic

• Neutral

Tags

NGSS.HS-PS1-4

What type of reaction is this?

• Exothermic

• Endothermic

• Kinetic

• Potential

Tags

NGSS.HS-PS1-4

A positive ΔH means that:

• In order for the reaction to happen, heat must be input. It is exothermic

• In order for the reaction to happen, heat must be input. It is endothermic.

• When the reaction happens, heat is released. It is exothermic

• When the reaction happens, heat is released. It is endothermic

Tags

NGSS.HS-PS1-4

ΔH is the same thing as:

• temperature

• q

• m

• C

Tags

NGSS.HS-PS1-4

NGSS.HS-PS3-1

ΔH means:

• temperature

• calorimetry

• enthalpy

• syntropy

Tags

NGSS.HS-PS3-1

A process that loses heat to the surroundings

• energy

• heat capacity

• law of conservation of energy

• exothermic process

The mass of a sample is 12g. There’s a temperature change from 20°C to 35°C when it absorbed 500 J of heat. What is the specific heat of this sample?

• 8.67 J/g•°C

• 2.78 J/g•°C

• 1.23 J/g•°C

• 108.67 J/g•°C

Tags

NGSS.HS-PS3-1

NGSS.HS-PS3-4

How much heat is produced when 57 grams of Lead is heated from 45°C to 67°C. The specific heat of Lead is 0.128 J/g•°C.

• 8.289 Joules

• 185,142 Joules

• 185.142 Joules

• 160.512 Joules

Tags

NGSS.HS-PS3-4

How much heat is produced when 750.0 mL of water is raised from 30°C to 89°C?

• 8.289 Joules

• 160.512 Joules

• 185,142 Joules

• 185.142 Joules

Tags

NGSS.HS-PS3-4