Thermodynamics Calculations Practice

When water is heated from 10°C to 15°C What is the change in temperature?

• 10 °C

• 5 °C

• 15 °C

• -5 °C

Tags

NGSS.HS-PS3-4

___________ is measured by the unit calories.

• Heat energy

• Temperature

• Specific heat

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.HS-PS3-1

How many calories of energy are required to make 100 grams of ice at 0 ^οC completely melt?

for water:

H_f = 80 cal/g

H_v = 540 cal/g

C_liquid = 1.00 cal/g°C

• 8 000 cal

• 54 000 cal

• 0 cal

• 1.25 cal

Tags

NGSS.HS-PS3-1

How many calories are required to boil 75 grams of water?

for water:

H_f = 80 cal/g

H_v = 540 cal/g

C_liquid = 1.00 cal/g°C

• 6 000 cal

• 40 500 cal

• 7 500 cal

• 0.138 cal

Tags

NGSS.HS-PS3-1

A sample of metal has a mass of 5.2 g and absorbs 4.78 cal of energy as it is heated from 30.0°C to 37.35°C. What is the heat capacity of the metal?

• 183 cal/g °C

• 0.025 cal/g °C

• 0.031 cal/g °C

• 1.25 cal/g °C

Tags

NGSS.HS-PS3-1

NGSS.HS-PS3-2

How many calories of energy are required to make 100 grams of steam at 100 ^οC completely condense?

for water:

H_f = 80 cal/g

H_v = 540 cal/g

C_liquid = 1.00 cal/g°C

• 8000 cal

• 54 000 cal

• 10 000 cal

• 0 cal

Tags

NGSS.HS-PS3-1

How many joules are required to boil 75 grams of water?

• 25050J

• 169500J

• 31350J

• 10000J

Tags

NGSS.HS-PS3-1

NGSS.HS-PS3-4

When do you use 540 cal/g? You may select more than one answer.

• if a substance is condensing

• if a substance is freezing

• if a substance is boiling

• if a substance is melting

A substance is condensing. Which formula should you use?

• Q= mHf

• Q= mC∆T

• Q= mHv

Tags

NGSS.HS-PS3-4