1.00 × 10² kJ/mol

Liquid sodium can be used as a heat transfer fluid. Its vapor pressure is 40.0 torr at 633°C and 400.0 torr at 823°C. What is its heat of vaporization?

▸ 43.4 kJ/mol

▸ 52.5 kJ/mol

▸ 70.6 kJ/mol

▸

1.00 × 10² kJ/mol

▸ 3.64 kJ/mol

39.4 kJ

Liquid ammonia can be used as a refrigerant and heat transfer fluid. How much energy is required to heat 25.0 g of NH₃( l) from  –65.0°C to  –12.0°C?

Normal boiling point	–33.4°C
Specific heat of NH3( l)	4.7 J/g •°C
Specific heat of NH3( g)	2.2 J/g •°C
Molar heat of vaporization	23.5 kJ/mol

▸ 4.92 kJ

▸ 16.0 kJ

▸ 34.5kJ

▸ 39.4 kJ

▸ 182.8kJ

12

Lead crystallizes in the face-centered cubic lattice. What is the coordination number for Pb?

▸ 4

▸ 6

▸ 8

▸ 10

▸ 12

8

Iron crystallizes in the body-centered cubic lattice. What is the coordination number for Fe?

▸ 4

▸ 6

▸ 8

▸ 10

▸ 12

the liquid level in a capillary tube will rise above the surrounding liquid and the surface in the capillary tube will have a concave meniscus.

If the adhesive forces between a liquid and the walls of a capillary tube are greater than the cohesive forces within the liquid,

▸

the liquid level in a capillary tube will rise above the surrounding liquid and the surface in the capillary tube will have a convex meniscus.

▸ the liquid level in a capillary tube will rise above the surrounding liquid and the surface in the capillary tube will have a concave meniscus.

▸ the liquid level in a capillary tube will drop below the surrounding liquid and the surface in the capillary tube will have a convex meniscus.

▸ the liquid level in a capillary tube will drop below the surrounding liquid and the surface in the capillary tube will have a concave meniscus.

▸ the liquid level in a capillary tube will be flat.