WorksheetsZeroth and first laws of trermodynamics
Total questions: 15
Worksheet time: 12mins
The zeroth law of thermodynamics states that if two bodies are each in .................. equilibrium with some third body, then they are also in ....................... with each other.
(a)
The most common application of the Zeroth Law of Thermodynamics is the thermometer. Using a simple thermometer containing (a) in a tube, we may watch the Zeroth law in operation. The liquid inside the tube expands as the temperature rises because the tube's area remains constant.
The First Law of Thermodynamics states that energy cannot be ...................... or destroyed; it can only be ..................................... from one form to another.
(a)
Fill in the missing quantity in this law: ΔQ=Δ U+...
(a)
What is an adiabatic process?
A process with no change in temperature
A process with no heat exchange with the surroundings
A process with no change in volume
A process with constant pressure
In an adiabatic expansion of an ideal gas, the temperature of the gas:
Increases
Decreases
Remains constant
Doubles
Which of the following statements is true for an adiabatic process?
ΔQ = ΔU + ΔW
ΔQ = ΔU
ΔQ = ΔW
ΔQ = 0
ΔU=0 means that the process is isothermic. True or False?
True
False
First law of thermodynamics is based on?
Conservation of work
Conservation of momentum
Conservation of mass
Conservation of energy
If 315cal of heat is given to the system, and the system does 20cal of work, find the change in internal energy.
335J
0 cal
335cal
295cal
Consider a gas contained in a rigid container of volume 20m3. What will be the change in internal energy if 50J of heat is provided to it? Assume the gas exerts a pressure of 1atm on the walls.
50J
0
70J
20J
A disc spinning with 24J of kinetic energy is kept in a container containing a fluid having a heat capacity of 2000J/K. When the disc comes to rest what will be the change in internal energy if ΔU = 3.5ΔT.
0.042J
0
0.021J
0.028J
In the given system, 20J of heat is supplied to the gas molecules. The spring is initially not elongated or compressed. If the spring gets compressed by 1cm. Calculate the change in internal energy of the system. Spring constant = 200N/m. Assume piston moves slowly.
19J
19J
21J
-21J
The first law of thermodynamics furnishes the relation between
heat and work
heat, work, and property of the system
various properties of the system
various thermodynamic processes
A system which neither exchange energy nor matter with its surrounding is known as………….
isolated system
open system
closed system
none of the above
