Thermochemistry Stoichiometry

What area of study in chemistry is concerned with the heat transfers that occur during chemical reactions?

• stoichiometry

• thermochemistry

• inorganic chemistry

• physical chemistry

Tags

NGSS.HS-PS1-4

NGSS.HS-PS3-4

When heat flows from system to the surroundings that is an example of an ________________ process.

• exothermic

• endothermic

Tags

NGSS.HS-PS3-4

Which will heat up slower?

• water

• lead

• granite

• iron

Tags

NGSS.HS-PS3-4

What would be the effect on the particles if more heat is supplied to the system?

• They would slow down

• They would stop moving

• They would speed up

• There would be no effect

Tags

NGSS.HS-PS1-5

NGSS.HS-PS3-2

NGSS.HS-PS3-4

A number written in front of a chemical formula is called a(n)

• subscript

• superscript

• yield

• coefficient

The blue numbers in the image below represent ________

• I don't know, and don't want to try

• coefficients

• subscripts

• none of the answers are correct

What is the molar mass of CO₂?

• 12

• 16

• 32

• 44

What does the heat capacity of an object measure?

• the amount of energy required to change the temperature of an object

• the total amount of energy an object can store

• the thermal potential energy of the object

• the amount of work done by the object

• the amount of energy required to melt a solid object

A measure of the average kinetic energy of the particles in a sample of matter.

• temperature

• meter

• second

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

The reaction of calcium chloride and water in the hot pack

tindak balas antara kalsium klorida dengan air dalam pek panas

(a)  

• releases water/ membebaskan air

• releases heat/ membebaskan haba

• absorbs water/ menyerap air

• absorbs heat/ menyerap haba

Tags

NGSS.HS-PS1-4

NGSS.HS-PS3-4