There are 7 significant figures
Answer:
The answer to your question is C = 2.01 J/g°C
Explanation:
Data
mass = m = 278 g
Temperature 1 = T1 = 0.8°C
Temperature 2 = T2 = 15.9 °C
Heat = Q = 8.46 x 10³ J
Heat capacity = C = ?
Process
1.- Write the formula to calculate the heat
Q = mC(T2 - T1)
2.- Solve for C
C = Q / m(T2 - T1)
3.- Substitution
C = 8.46 x 10³ / 278 (15.9 - 0.8)
4.- Simplification
C = 8.46 x 10³ / 4197.8
5.- Result
C = 2.01 J/g°C
Answer:
The process is adiabatic because there no heat transfer into the system or out of the system in that there is only one system involved in this process that is air.
The temperature of the air mass when it has risen is
Explanation:
From the question we are told that
The atmospheric pressure is
The temperature heated to
The new atmospheric pressure is
The value of g is
The rate of cooling is
The adiabatic relation for this process is mathematically represented as
Now , , ,
substituting value
=>
Answer:
The volume will be 12.05 L
Explanation:
Boyle's law says that "The volume occupied by a certain gaseous mass at constant temperature is inversely proportional to pressure" and is expressed mathematically as:
P * V = k
Charles's law states that the volume of a gas is directly proportional to the temperature of the gas. That is, Charles's law is a law that says that when the amount of gas and pressure are kept constant, the ratio between the volume and the temperature will always have the same value:
Finally, Gay-Lussac's law states that at constant volume, the pressure of the gas is directly proportional to its temperature. This is expressed mathematically as:
Combined law equation is the combination of three gas laws called Boyle's, Charlie's and Gay-Lusac's law:
Analyzing an initial state 1 and a final state 2, this law can be expressed as:
In this case:
- P1= 0.956 atm
- V1= 14.3 L
- T1= 23 °C= 296 °K
- P2= 1.20 atm
- V2= ?
- T2= 40 °C= 313 °K
Replacing:
Solving for V2:
V2= 12.05 L
<u><em>The volume will be 12.05 L</em></u>
Heat can be transferred from one object to another in 3 different ways.
1) Conduction : This is the mode of transfer of heat through solid medium.
Example : A metal rod getting hot when hold over a flame.
2) Convection : This is the mode of transfer of heat through liquids
Example : Boiling of water.
3) Radiation : This type of heat transfer does not require any medium.
Example : When we stand close to a campfire, we feel warmer. Here the heat travels through air.
In the given problem, when a person gets into a car with hot black leather, his skin comes in contact with the hot object. Here the heat gets transferred through the skin which is a solid medium.
Therefore this is an example of conduction.