Heat and Thermodynamics

Problems

Q1. Calculate the RMS velocity of hydrogen at 300 K. The Boltzmann constant is 1.38 × 10⁻¹⁶ ergs per degree and mass of the hydrogen molecule is 3.34 × 10⁻²⁴ gm.

Ans. 19.3 × 10⁴ cm/sec

Q2. Calculate the RMS velocity of nitrogen at 0°C. The density of nitrogen at NTP is 1.25 gm/litre.

Ans. 4.93 × 10⁴ cm/sec

Q3. Calculate the RMS velocity of the molecules of a gas whose density is 1.4 gm/litre at a pressure of 76 cm of mercury. Density of mercury = 13.6 gm/cc and g = 980 cm/sec².

Ans. 4.66 × 10⁴ cm/sec

Q4. Calculate the molecular kinetic energy of 1 gm of hydrogen at 0°C (R = 8.32 × 10⁷ ergs /mole/degree).

Ans. 17 × 10⁹ ergs

Q5. One cc of oxygen weighs 0.00144 gm at NTP Find the RMS speed of an oxygen molecule at 100°C.

Ans. 5.37 × 10 ...