100 grams of liquid nitrogen at 77 K is stirred into a beaker ...

[danielfitts88]

100 grams of liquid nitrogen at 77 K is stirred into a beaker containing 200 grams of 5C water. If the nitrogen leaves the solution as soon as it turns to gas, how much water freezes? (The heat of evaporation of nitrogen is 6.09 cal/gram and the heat of fusion of water is 80 cal/gram.)

Question 2

In braking an automobile, the friction between the brake drums and brake shoes converts the car's kinetic energy into heat. If a 1 500-kg automobile traveling at 30 m/s brakes to a halt, how much does the temperature rise in each of the four 8.0-kg brake drums? (The specific heat of each iron brake drum is 448 J/kgC).

[dreamfighter72]

Answer to Question 1

none

Answer to Question 2

47C

[danielfitts88]

YES! Correct, THANKS for helping me on my review

[nothere]

Thanks for the timely response, appreciate it