# The temperature at which a system undergoes a reversible isothermal process without transfer of heat is called as

## The temperature at which a system undergoes a reversible isothermal process without transfer of heat is called as _________

a. critical temperature
b. Kelvin temperature
c. absolute zero temperature
d. reversible temperature

Correct Answer: c. absolute zero temperature

Explanation:

According to the definition of Kelvin scale,

Q/Qt = T/ Tt

T = 273.16 (Q/Qt)

from the above equation, it is clear that the heat transferred isothermally between two adiabatic bodies decreases if temperature decreases. Here Qt is the thermometric property. Therefore, from above equation if Q is having smaller value then T also lowers. The smallest possible value of Q is zero and corresponding T is zero.

Thus, the temperature at which a system undergoes a reversible isothermal process without transfer of heat is called as absolute zero. At absolute zero, an isotherm and adiabatic are identical.