The average translational kinetic energy of the atoms in a solid is directly…

PHYSICS · Single correct · CBSE · Physics · Kinetic Theory · Kinetic Theory

Problem

The average translational kinetic energy

K_{\text{avg}}

of the atoms in a solid is directly proportional to the absolute temperature

T

. Two identical copper blocks are initially at 450 K and 300 K, respectively, and are then placed in contact. What is the initial ratio

K_{\text{avg,hot}}/K_{\text{avg,cold}}

of the average kinetic energy per atom in the hotter block to that in the colder block? (a)

1.22

(b)

0.67

(c)

1.5

(d)

2.25