Thermochemistry and Kinetics

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-PS3-1

NGSS.HS-PS3-4

What kind of graph is this?

• endothermic

• exothermic

Tags

NGSS.HS-PS1-4

Enthalpy is energy absorbed or relased during a chemical reaction as

• light.

• heat.

• sound.

• pressure.

Tags

NGSS.HS-PS1-4

What type of reaction is this?

• Endothermic

• Exothermic

• Allergic

Tags

NGSS.HS-PS1-4

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-PS1-4

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-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

What type of reaction is this?

• Endothermic

• Exothermic

• Allergic

Tags

NGSS.HS-PS1-4

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