Latent Heat and Specific Heat Capacity

Latent heat is

• the heat absorbed or released at a boiling process during a change of phase

• the heat absorbed or released at a constant temperature during a change of phase

• the heat absorbed or released at a constant temperature during a change of phase of 1 kg object

• the heat absorbed or released by an object to increase or decrease its temperature by 1 degree Celcius

the symbol for specific latent heat is

• c

• L

• Q

• m

The amount of energy required to raise the temperature 1ºC for every kilogram is called____?

• Thermal Energy

• Specific Heat

• Temperature

• Kinetic Energy

Water has a specific heat of 4184 J/KgºC.  Wood has a specific heat of 1760 J/KgºC.  What material needs more energy to raise the temperature 1ºC

• Wood

• Water

• Both are the same

The unit for specific heat is

• J

• J/gC

• g

Specific Heat

• Materials that do not conduct heat well.

• A material that conducts heat well,

• The amount of energy required to raise the temperature of 1 kilogram of a material by 1 kelvin.

• The expansion of matter when it is heated.

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

Object A has a specific heat of 4.45 J/g⁰C and object B has a specific heat of 1.82 J/g⁰C. Which object will heat up faster?

• Object A, it has a lower specific heat

• Object B, it has a lower specific heat

• Object A, it has a higher specific heat

• Object B, it has a higher specific heat

Tags

NGSS.MS-PS3-4

Which of the following best explains why the sand at the beach is hotter than the water?

• Sand has a higher specific heat than water.

• Sand has a lower specific heat than water.

• There is more water than sand at the beach.

• There is more sand than water at the beach.

Tags

NGSS.MS-PS3-4

NGSS.MS-PS3-5

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

If 5.0 x 10⁵ J of energy is absorbed by a block of ice when it is heated from -5^oC to 0^oC, find the mass of the ice.

Given that the specific heat capacity of ice is 2.05 x 10³ J kg^{-1 o}C^-1 and the specific latent heat of fusion of ice is 3.34 x 10⁵ J kg^-1.

• 1.45 kg

• 2.56 kg

• 3.01 kg

• 3.27 kg

Tags

NGSS.HS-PS3-1

NGSS.HS-PS3-2

NGSS.HS-PS3-4