Question

Please help with the second part of 8,# 9 and #10

A cube with a mass of 55 g is made from a metal with a density of 6 g/cm^3. What is the volume of the cube and the length of each edge? volume 9.16 cm^3 length 3 cm How much heat is required to raise the temperature of 380 g of water from 20 degree C to 31 degree C? 4.175 cal 90 grams of water at 75 degree C are mixed with an equal amount of water at 25 degree C in a completely inculcated contains. The final temperature of the water is 50 degree C. (a) How much heat is lost by the hot water? cal (magnitude only) (b) How much heat is gained by the cold water? (c) What happens to the total amount of internal energy of the system? remained unchanged helves doublias

Answer 1

Volume = mass / density

V = 55 / 6 = 9.17 cm^3

V = L^3 = 9.17

L = 2.09 cm ..........Ans

9. Q = m C deltaT

= 380 x 1 cal/g deg C x (31 - 20)

= 4180 Cal

10. (A) Q = 90 x 1 x (75- 50) = 2250 cal

(B) Q = 90 x 1 x (50-25) = 2250 ca;

(c) remains unchangd.