A student is collecting the gas given off from a plant in bright sunlight at a temperature of 27°c. The gas being collected is p
1 answer:
You might be interested in
Answer:
Q=1005 J
t= 0.67 sec
Explanation:
Lets take condition of room is 1 atm and 25°C.
Heat capacity ,c = 21 J /K.mol
If we assume that air is ideal gas that
P V = n R T
V= 107250 L
At STP number of moles given as
V=22.4 L at S.T.P.
n=4787.94 moles
n= 4.784 Kmoles
So heat required to raise 10°C temperature
Q = n x c x ΔT
Q = 4.78794 x 21 x 10
Q=1004.64 J
Time t
t= Q/P
P= 1.5 KW
t = 1.004.64 /1.5
t= 0.66 sec
Answer:
The second snowball hits the ground with a kinetic energy of 100 Joules
Explanation:
Given that,
From the edge of a roof you throw a snowball downward that strikes the ground with 100 J of kinetic energy. It is a case of conservation of energy.
At the highest point,
At lowest point,
From above two equation, we get :
Kinetic energy, K = 100 J
So, the second snowball hits the ground with a kinetic energy of 100 Joules. So, the correct option is (A).
In <u>370 K to 375 K </u>temperature intervals of 5 K, would be the greatest increase in the entropy of the sample.
Option: C
<u>Explanation</u>:
Because the largest difference in molar entropy occurs when a condensed phase (solid/liquid) transforms to the gas phase. Then change in entropy is equal to heat transfer divided by temperature: .
According to given ice sample at 260 K, when this solid sample start converting into liquid sample it will gain positive temperature and steam will take place near 373 K (273 K ice temperature + temperature of boiling water). Therefore it’s very obvious that greatest increase in entropy will occur during 370 K – 375 K.
Explanation:
Force Description
1. It is also known as the weight of an object. It is the force that is exerted on an object due to its mass
2. It is force which is exerted by a push or a pull on an object. It is also known as applied force.
3. It is known as resistive force. It opposes the motion of an object.
4. It is the force which is at a right angle to the surface or perpendicular to the surface.