experiment 6: specific heat capacity

Question 1

It is the quantity of heat requires to raise the temperature of the body by 1 degree Celsius

Answer 1

Heat capacity of a body
- how much heat you need to raise the temperature of an entire object by a certain amount

Question 2

It is defined as the heat per unit mass per degree change in temperature.

Answer 2

Specific heat of a substance
- tells you how much heat is needed to raise the temperature of just one unit of mass (like one kilogram) of a substance by one degree (1°C)

Question 3

True or false:

the quantity of heat lost by the warmer body is equal to the heat gained by the cooler body, and some intermediate equilibrium temperature is finally reached.
In the second part of this lab, you will be measuring the latent heat of fusion of water. In this context,
“fusion” means “melting.” Phase changes, such as going from solid to liquid or liquid to gas, require energy.

Answer 3

True - When you have two objects at different temperatures (one hot and one cold) and you put them together, heat moves from the hot object to the cold one.
The heat that the hot object loses is exactly equal to the heat that the cold object gains. This continues until they reach the same temperature, called the equilibrium temperature.

Question 4

Fusion means

Answer 4

Melting

Question 5

What happens in the latent heat of fusion of water.

Answer 5

Phases changes like going from
S to L
L to G
they require energy

Question 6

Formula of specific heat

Answer 6

c= Q/ m⋅Δt

c = specific heat (how much heat per unit mass per degree)
Q = total heat added
m = mass of the substance
∆t = change in temperature (how much the temperature increases)

​

Question 7

What equipment is needed to measure the mass of the metal sample

Answer 7

Top-loading balance

Question 8

Mcal

Answer 8

Calorimeter

(It’s like a metal cylinder tin)

Question 9

Fill how much of water in the inner calorimeter

Answer 9

One-third of its volume

Question 10

Fill how much of water in the inner calorimeter

Answer 10

One-third of its volume

Question 11

Calculate Mw

Answer 11

to find the mass of water
Get the difference btwn Mcal+water and Mcal

Question 12

Calculate Mw

Answer 12

How to find the mass of water

Question 13

How do you measure the temperature

Answer 13

Using the temperature probes

Question 14

Tw

Answer 14

Initial temperature of water

Question 15

Tsample

Answer 15

Temperature of metal sample

Question 16

What should you do after measuring the temperature of the metal sample

Answer 16

Remove the metal sample from the boiling water
Quickly wipe it dry
Suspend it in water in the calorimeter
Sample should be immersed in water but not touching the bottom of the calorimeter

Question 17

Find change in Tw

Answer 17

∆𝑻𝒘 = 𝑻𝒇 − 𝑻𝒘

Question 18

Find the change in temperature of metal sample

Answer 18

∆𝑻𝒔𝒂𝒎𝒑𝒍𝒆 = 𝑻𝒔𝒂𝒎𝒑𝒍𝒆 − 𝑻𝒇

Question 19

Determine the specific heat of metal sample by applying the law of heat exchange

Answer 19

Heat gained by water = Heat lost by metal sample
𝑸𝒈𝒂𝒊𝒏𝒆𝒅 = 𝑸𝒍𝒐𝒔𝒕

Question 20

Determine the specific heat of metal sample by applying the law of heat exchange

Answer 20

Heat gained by water = Heat lost by metal sample
𝑸𝒈𝒂𝒊𝒏𝒆𝒅 = 𝑸𝒍𝒐𝒔𝒕

Question 21

What is the specific heat of the metal sample

Answer 21

𝒄𝒔𝒂𝒎𝒑𝒍𝒆 = M𝒘C𝒘∆𝑻𝒘 +M𝒄𝒂𝒍C𝒄𝒂𝒍∆𝑻𝒄𝒂𝒍
/M𝒔𝒂𝒎𝒑𝒍𝒆 ∆𝑻𝒔𝒂𝒎𝒑𝒍𝒆

Question 22

How many grams of ice

Answer 22

Btwn 10 and 30 grams
Or
Size of a teaspoonful
Or
Couple of grapes

• If the sample of ice is too large, the ice will not melt completely and you will have
  to repeat the experiment with a smaller sample.

Question 23

True or false:
The ice should be at 0°C when you put it in the calorimeter.

Answer 23

True - If the ice was taken fresh from a freezer, it might be colder. If that is the case, let the ice rest on the table until it starts to melt

Question 24

What happens if there is water on the ice

Answer 24

Remove the excess water from the ice and just before putting the ice into the calorimeter

Question 25

What equipment is used to weigh the thermal equilibrium

Answer 25

GLX

Question 26

Compute the latent heat of fusion of water.

Answer 26

Heat Gained = Heat Lost

(Heat that enters the ice) + (Heat that enters the ice water) = (Heat lost by the cup) + (Heat lost by the stirrer) + (Heat lost by the cup water)

Question 27

Where do we place the
Warm water -
Ice water -

Answer 27

Warm water - into the calorimeter cup
Ice water - it is the source of thermal energy

Question 28

What is the general eqn for latent heat

Answer 28

Q=mL

m is the mass of the substance
L is the latent heat