hi
How many joules of heat are generated by the brakes of a 1000 kg car when it is brought to rest from a speed of 50 km h-1? If we use this amount of heat to heat 1.0 L of water from an initial temperature of 30 degree C, estimate the final temperature assuming that the heat capacity of water is about 1 calmL-1 (1 cal = 4.184 J). Show transcribed image text How many joules of heat are generated by the brakes of a 1000 kg car when it is brought to rest from a speed of 50 km h-1? If we use this amount of heat to heat 1.0 L of water from an initial temperature of 30 degree C, estimate the final temperature assuming that the heat capacity of water is about 1 calmL-1 (1 cal = 4.184 J).
hi
For unlimited access to Homework Help, a Homework+ subscription is required.
Related textbook solutions
Basic Chemistry
Principles of Chemistry Molecular Approach
Principles of Chemistry Molecular Approach
Chemistry: Structure and Properties
Chemistry: A Molecular Approach
Chemistry: A Molecular Approach
Principles of Chemistry: A Molecular Approach
Chemistry: The Central Science
Related questions
Info for part 1: Determining the heat capacity of the calorimeter
Mass of the empty Styrofoam cups and cover: 30.21 g
Mass of the cups, cover and 70 ml cool water: 95.21 g
Mass of the cups, cover, 70 ml water and 30 ml hot water: 127.41 g
Initial temperature of the hot water (boiling bath): 99.5 C
Initial temperature of the cool water in the cups: 18 C
Final temperature of the calorimeter and the added hot water: 43 C
Calulations: Please show work I am so confused
a)Mass of the hot water (mhot) (g)
b)Temperature change of the hot water (J)
c)Heat lost by the hot water (J)
d)Mass of the cool water (mcool) J/C
e)Temperature change of the cool water J/C
f)Heat absorbed by the cool water
g) Heat gained by the calorimeter
h)Heat capacity of the calorimeter
i)Average Heat capacity of the calorimeter from both trials
J)Initial temperature of the hot metal (boiling bath): 30.21 g
K) Initial temperature of the cool water in the cups: 131.07 g
L)Final temperature of the calorimeter and the added hot metal: 84.67 g
Part 2 info: determining the heat capacity of a metal
Mass of the empty Styrofoam cups and cover: 30.21 g
Mass of the cups, cover and 100 ml water:131.07 g
Mass of the metal (mm):84.67 g
Initial temperature of the hot metal (boiling bath): 99.3 C
Initial temperature of the cool water in the cups: 21.3 C
Final temperature of the calorimeter and the added hot metal: 27.4 C Calculations :( (metal is nickel) -Mass of the cool water (mcool) -Temperature change of the cool water -Heat absorbed by the cool water -Heat gained by the calorimeter -Heat lost by metal -Temperature change of the hot metal -Specific Heat of metal -Average Specific Heat of metal -percent error |