S2-Test 4_Review for Scholars (Thermochemistry) At Home

If 238 J of heat is absorbed by a sample of metal with a mass of 40.7 g, and it raises the temperature from 20.0°C to 32.4°C, what is the specific heat capacity of the metal? (show your work)

• 2.34 J/g°C
• 0.472 J/g°C
• 6.13 J/g°C
• 0.163 J/g°C

Tags

NGSS.HS-PS3-4

A liquid with a specific hear of 1.9 J/gC has 4750 J of energy added to it. The temperature changed from 20 degrees C to 30 degrees C, what is the mass of the liquid?

• 250 cal
• 2500cal
• 250 g
• 2500 cal

Tags

NGSS.HS-PS3-1

The specific heat(c) of copper is 0.39 J/g °C. What is the temperature change(∆t) when 100 Joules of heat(Q) is added to 20 grams?

• 12.82 °C
• 24.12°C
• 351 °C

Tags

NGSS.HS-PS3-1

NGSS.HS-PS3-4

Chemical reactions where both q and H are negative are considered

• spontaneous
• nonspontaneous
• exothermic
• endothermic

In an _________________ process, the system gains heat from its surrounding

• Endothermic

• Exothermic

In an _____________ process, the system releases heat to its surrounding

• Exothermic

• Endothemic

Thermal energy always moves:

• From a high temperature object to a lower temperature object.
• From a lower temperature object to a higher temperature object.
• From an object with lower kinetic energy to an object with higher kinetic energy.
• From an object of higher mass to an object of lower mass.

Tags

NGSS.HS-PS3-2

NGSS.HS-PS3-4

What letter represents the activation energy?

• A

• B

• C

• D

Tags

NGSS.HS-PS1-4

Activation energy is the energy required to form the

• original bonds.

• activated complex.

• reaction complex.

• reactant molecules.

What are the two units for Heat?

• cal and joules
• cal and grams
• joules and celcius
• there is only one