\(H_2\)
To determine which among the given options has the least coefficient of thermal conductivity, let's first understand the concept of thermal conductivity.
Thermal Conductivity: It is a property of a material that indicates its ability to conduct heat. Materials with high thermal conductivity transfer heat more efficiently than those with low thermal conductivity.
The options given are:
- \(H_2O\) (Water)
- \(H_2\) (Hydrogen)
- \(Cu\) (Copper)
- \(Al\) (Aluminum)
Thermal Conductivity Values:
- \(Cu\) (Copper) - Approximately 401 W/mK
- \(Al\) (Aluminum) - Approximately 237 W/mK
- \(H_2O\) (Water) - Approximately 0.6 W/mK
- \(H_2\) (Hydrogen) - Approximately 0.180 W/mK
From these values, it is clear that \(H_2\) (Hydrogen) has the least coefficient of thermal conductivity among the given options.
Conclusion: The correct answer is \(H_2\) because it has the lowest thermal conductivity, meaning it is the least effective at conducting heat compared to the other substances listed.
Important Questions from Heat transfer
________ is not a type of heat transfer.
A. Diffusion
B. Reflection
C. Convection
D. Radiation- A high-power industrial microwave transmitter operates at a power output of $250 \text{ MW}$. What is the total energy ideally radiated by this transmitter in $20 \text{ minutes}$?
The value of Solar Constant is
According to Kirchhoff's law of thermal radiation, for a surface to be considered a perfect black body at a given temperature, which of the following statements regarding its emissivity ($\epsilon$) and absorptivity ($\alpha$) is true?
Which one of the following is the best conductor of heat?
