Thermochemistry Test Review

Th SI unit of energy

• calorie

• joule

• specific heat

Quantity of heat needed to raise the temperature of 1g of a substance by 1 degree C

• a) calorie

• b) joule

• c) specific heat

Tags

NGSS.HS-PS3-4

The amount of energy that is absorbed or lost by a system as heat during a process at constant pressure

• a) enthalpy

• b) entropy

• c) specific heat

• d) energy

A measure of the disorder of system containing energy or information

• a) enthalpy

• b) entropy

• c) specific heat

• d) energy

What  is the formula to calculate heat energy required to raise the temperature of any substance?

• Q=mc∆t
• Q=mc
• Q= ½mv
• m=QC

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

20 g of water. specific heat of water is 4.18 J/x°C.  temperature changes from 25° C to 20° C, how much heat energy (Q) moves from the water to the surroundings?

• 418 Joules
• 209 J
• 83 J
• 4.18 J

Tags

NGSS.HS-PS3-1

NGSS.HS-PS3-4

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

In an endothermic reaction the system is releasing energy.

• True
• False

Tags

NGSS.HS-PS1-4

In an exothermic process, the surroundings are are gaining energy.

• True
• False

Tags

NGSS.HS-PS1-4

For an endothermic reaction, the heat is on the ____ side.

• reactant
• product
• either side

Tags

NGSS.HS-PS1-4