Heat and thermodynamics

Written by Dr. Hamza Farooq (Physics)

Class 11 · Physics · 9 questions

Name: ____________________   Date: ____________

1. The first law of thermodynamics is a statement of conservation of:

   • A Energy
   • B Mass
   • C Charge
   • D Momentum

2. For an isothermal process the temperature is:

   • A Rising
   • B Constant
   • C Falling
   • D Zero

3. In an adiabatic process, there is no:

   • A Pressure
   • B Work
   • C Heat exchange
   • D Volume change

4. The efficiency of a Carnot engine working between 400 K and 300 K is:

   • A 75 percent
   • B 25 percent
   • C 33 percent
   • D 100 percent

5. Entropy of an isolated system tends to:

   • A Stay zero
   • B Decrease
   • C Become negative
   • D Increase

6. The molar gas constant R is about:

   • A 8.31 J/mol K
   • B 83.1 J/mol K
   • C 0.0821 J/mol K
   • D 1.38 J/mol K

7. Heat flows spontaneously from a body at:

   • A Higher temperature to lower temperature
   • B Lower to higher
   • C Zero
   • D Equal temperature

8. The internal energy of an ideal gas depends only on its:

   • A Volume
   • B Colour
   • C Pressure
   • D Temperature

9. An isobaric process takes place at constant:

   • A Volume
   • B Temperature
   • C Entropy
   • D Pressure