Thermochemistry Pre-Assessment

What type of reaction is this?

• Endothermic

• Exothermic

• Allergic

Tags

NGSS.HS-PS1-4

What type of reaction is this?

• Endothermic

• Exothermic

• Allergic

Tags

NGSS.HS-PS1-4

When two samples of similar mass are subjected to the same heat energy, the sample with the SMALLER specific heat will have a _________ temperature change.

• SMALLER

• LARGER

• EQUAL

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

Calculate A 50g sample is heated with 500 joules of energy and has a 10*C temperature change. Calculate it’s specific heat.

• 1 j/g*C

• 250000 j/g*C

• 500 j/g*C

• 10 j/g*C

Tags

NGSS.MS-PS3-4

4180 j of heat energy are added to change the temperature of water by 10*C. How many grams of water are being heated? c_water=4.18 j/g*C

• 4.18 j/g*C

• 10000g

• 174724g

• 100g

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

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

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

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

Which of these is a correctly balanced thermochemical equation for the combustion of C₂H₄?

• C₂H₄ (g) + 3O₂ (g) → 2CO₂ (g) + 2H₂O (g)

• 2C₂H₄ (g) + 6O₂ (g) → 4CO₂ (g) + 4H₂O (g)

• C₂H₄ (g) + 3O₂ (g) → 2CO₂ (g) + 2H₂O (g) ΔH_comb= -1411 kJ/mol

• 2C₂H₄ (g) + 6O₂ (g) → 4CO₂ (g) + 4H₂O (g) ΔH_comb= -1411 kJ/mol

Tags

NGSS.HS-PS1-4

NGSS.HS-PS3-4

Is this reaction endothermic or exothermic?

• endothermic

• exothermic

Tags

NGSS.HS-PS1-4