1.61 x 104 molecules Od
2.26 x 1029 molecules
Oe
1.77 x 1029 molecules
Question 5 (1 point)
A 1.3 kg block of copper initially at 12°C is dropped into a large vessel of liquid nitrogen. The temperature of the liquid nitrogen is 70 K. Find
the amount of liquid nitrogen that boils away as the copper reaches 70 K. (c(copper) = 385 J/kg.°C, L(nitrogen) = 2 x 105 j/kg