Calorimetry (Mixing) — Practice Quiz

Question 1

100 g water at 80°C mixed with 200 g water at 20°C. Final T:

Accepted Answer

40°C

Answer

50°C

Answer

30°C

Answer

70°C

Question 2

Two bodies at different temperatures placed in contact. Heat flows:

Accepted Answer

From hot to cold (always)

Answer

From cold to hot

Answer

From larger to smaller body

Answer

Depends on color

Question 3

A 100 g block of metal at 100°C dropped into 200 g of water at 20°C; final T = 24°C. c of metal:

Accepted Answer

~ 446 J/kg·K

Answer

~ 4186 J/kg·K

Answer

~ 1000 J/kg·K

Answer

~ 100 J/kg·K

Question 4

If the metal in (c) had been gold (c ≈ 130), what final T?

Accepted Answer

20.8°C

Answer

30°C

Answer

50°C

Answer

40°C

Question 5

Calorimetry assumes:

Accepted Answer

All of above for ideal case

Answer

No heat loss to surroundings

Answer

Vacuum container

Answer

Perfect mixing