#thermodynamics
- A gas contained in a cylinder fitted with a frictionless piston expands against a constant external pressure of 1 atm Answer: Δ U = -106.5\ J (internal energy decreases by 106.5 J) Given: P = 1\ atm = 1.013×10⁵\ Pa, V₁ = 5\ L, V₂ = 10\ L, heat absorbed Q = +... 2
- In thermodynamics, heat and work are : (1) Extensive thermodynamic state variables (2) Point functions (3) Path functions The correct answer is option 3) path function 2
- A gas contained in a cylinder fitted with a frictionless piston expands against a constant external pressure of 1 atm from Answer: Δ U = -106.5\ J (internal energy decreases by 106.5 J) Given: P = 1\ atm = 1.013×10⁵\ Pa, V₁ = 5\ L, V₂ = 10\ L, Q = +400\ J (absorb... 1
- A resistor held in running water carries electric current. Treat the resistor as the system Answer: (a) No (b) Yes (c) Yes, electrical work is done on the resistor (d) Δ U = 0, so the heat given to the water equals the electrical wo... 1
- State and explain the first law of thermodynamics The first law of thermodynamics is a form of law of conservation of energy applied to a system. Mathematically it can be written as Q=triang... 1