Question

No O A lche 101 points Pous HACPs 14.3 WA 001 To sterilize a 25.0-9 glass baby bottle, we must raise its temperature from 16.5°C to 95.0°C. How much heat transfer is required? The specific heat of glass is 840 16185 kg-C). O 0/1 points I Prous Anwer wro tte WA 025 A piece of iron block moves a s a rough horizontal surface before coming to rest. The mass of the blocks 2.3 , and its initial speed is 3.1 m/s. How much does the book's temperature increase boorts 69% of its initial Kinetic energy as internal energy? The specific heat of iron is 452 kg. c). 0 0079 X How many joules of energy from the initial inetic energy of the block goes into increasing the internal energy of the block? How is the internal energy related to temperature change and specific heat capacity?c My Moles Ask Your Teacher T o t points I Previous Answer HAF C 14 3 WA OX7 rum het sot to You pour 100 g hot coffee at 7.7°C and some cold cream at 7.50°C to a 115-9 up that is initially at a temperature of 22.0°C. The cup coffee and cream reach an temperature of 60.0°C. The material of the has a specific heat of 0.2604 a C ) and the heat of both the coffee and cream is 1.00 kc ). If the surroundings or gained from the surroundings, how much cream did you a 46

Answer 1

8)

Heat energy gained by the body, Q = 69% of KE

= 0.69*0.5*m*v^2

= 0.69*0.5*2.3*3.1^2

= 7.63 J

Now applying,

Q = m*c*dT

==> dT = Q/(m*C)

= 7.63 /(2.3*452)

= 0.00734 degrees Celsius