Q MCAT

The specific heat of platinum is 0.133 J/g°C. How much heat(Q) is absorbed when a 10 g piece of platinum warms from 100°C to 150°C? Q=mcT

• 66.5 J

• 665 J

• 0.0266 J

• 0.665 J

Tags

NGSS.HS-PS3-1

NGSS.HS-PS3-4

If 20 g of water undergoes a temperature change from 25° C to 30° C, how much heat energy (Q) moves from the water to the surroundings (the c for water is 4.18 j/g C)? Q=mcT

• 418 J

• 209 J

• 83 J

• 4.18 J

Tags

NGSS.HS-PS3-1

NGSS.HS-PS3-4

The SI units J/g°C measures

• Specific heat

• mass

• temperature

• heat energy

Tags

NGSS.HS-PS3-4

What is the temperature change(∆t) when 100 Joules of heat(Q) is added to 20 grams of copper, the c for copper is 0.39 J/gC. Q=mcT (T is the unknown)

• 12.82 °C

• 24.12°C

• 1.95 °C

• 5128 °C

Tags

NGSS.HS-PS3-1

How much heat(Q) is released when a 10 g piece of lead cools from 100°C to 35°C , the c for lead is 0.129 j/gC? Q=mcT

• 66.5 J

• 665 J

• 83.85 J

• 0.665 J

Tags

NGSS.HS-PS3-1

NGSS.HS-PS3-4

Which substance would heat up the fastest? ( the lower the specific heat the faster it heats up and cools down).

• aluminum (specific heat = 0.9)

• water (specific heat = 4.184)

• copper (specific heat =0.4)

• gold (specific heat= 0.13)

Tags

NGSS.HS-PS3-4

Which substance would require the most heat intake to increase its temperature by the same amount as the other samples listed? (The higher the specific heat number the more heat it takes to heat up).

• aluminum (c=0.9)

• water (c=4.18)

• copper (c=0.4)

• gold (c=0.13)

___________ is measured by the unit Joules.

• Heat energy, Q

• Temperature, T

• Specific heat, c

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

Calculate the energy transferred ,Q, when raising the temperature of 16000g of water by 3˚C. The c= 4.18 j/gC. Q=mcT

• 785 J

• 126000J

• 22000J

• 200640 J

Tags

NGSS.HS-PS3-1

NGSS.HS-PS3-4