Question

For each of the following pairs, circle the system that has the greater thermal energy. If their thermal energy is the same, circle both.

a) 1 mole of a monatomic solid at 250 K1 mole of a monatomic solid at 300 K
b) 2 moles of a monatomic solid at 273 K1 mole of a monatomic solid at 273 K
c) 1 mole of a monatomic gas at 290 K1 mole of a monatomic solid at 290 K
d) 1 mole of a monatomic gas at 300 K6.02 x 1023atoms of a monatomic gas at 300 K
e) 1 moles of a monatomicsolid at 300K2 molesof a monatomic gas at 300 K
f) 1 mole of a diatomic gas at 290 K1 mole of a monatomic gas 290 K

Answer 1

Step-by-step explanation:

a ) 1 mole of a monatomic solid at 300 K has greater thermal energy because of higher temperature .

b ) 2 moles of a monatomic solid at 273 K will have greater thermal energy because of larger amount of mass.

c ) 1 mole of a monatomic gas at 290 K will have greater thermal energy because gas has larger specific heat . Moreover we add heat to solid then it is converted into gas.

d ) Both will have same thermal energy because both are equivalent to one mole of gas.

e ) 2 moles of a monatomic gas at 300 K will have more thermal energy because of reason stated above ( point c )

f ) 1 mole of a diatomic gas at 290 K will have greater thermal energy because diatomic gas have greater specific heat due to greater no of degree of freedom.