Thermochemistry

What heat energy is required to raise the temperature of a 1g sample of mercury (c_Hg=.16 j/g*C) by 100*C?

• 16j

• .0016j

• 16000j

• 625 j

Tags

NGSS.HS-PS3-1

What does q stand for?

• Heat-Joules

• Mass-Grams

• Specific Heat-J/g*C

• Temperature Change-*C

Tags

NGSS.HS-PS3-4

What does c stand for?

• Heat-Joules

• Mass-Grams

• Specific Heat-J/g*C

• Temperature Change-*C

What does m stand for?

• Heat-Joules

• Mass-Grams

• Specific Heat-J/g*C

• Temperature Change-*C

Which of these processes is endothermic?

• freezing

• condensation

• deposition

• sublimation

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-3

NGSS.MS-PS3-4

A chemical reaction in a beaker causes the beaker to feel cold to the touch. What type of reaction occurred?

• endothermic

• exothermic

Tags

NGSS.HS-PS1-4

NGSS.HS-PS3-4

Which of these is the unit for specific heat?

• J

• J/g

• J/g^oC

• ^oC

A piece of aluminum with a mass of 20.0 grams is heated from 30 ^oC to 95 ^oC. If the specific heat of aluminum is 0.904 J/g^oC, how much heat is gained by the aluminum?

• 1717.60 J

• 1175.20 J

• 963.68 J

• 542.4 J

Tags

NGSS.HS-PS3-1

NGSS.HS-PS3-4

A 300 gram sample of a metal is cooled from 120 ^oC to 60 ^oC, and releases 4230 J of energy. What is the specific heat of the metal?

• 7.61 x 10⁷ J/g^oC

• 4.26 J/g^oC

• 0.47 J/g^oC

• 0.235 J/g^oC

Tags

NGSS.HS-PS3-1

A 95 gram volume of water has an initial temperature of 30 ^oC. A piece of metal with a mass of 120 grams and an initial temperature of 98 ^oC is placed in the water. The final temperature of the water and the metal is 35 ^oC. What is the specific heat of the metal?

• 7560 J/g^oC

• 3.80 J/g^oC

• 0.263 J/g^oC

• 1987.4 J/g^oC

Tags

NGSS.HS-PS3-1

NGSS.HS-PS3-4