Question

(A) How much heat transfer (in kJ) is necessary to raise the temperature of a 0.150 kg piece of ice from −16.0°C to 132°C, including the energy needed for phase changes? (Assume the substance remains at a constant volume throughout each stage of the heating process.)

(B) How much time (in s) is required for each stage, assuming a constant 21.5 kJ/s rate of heat transfer? (Enter your answers as a comma-separated list. Enter your times in order from the earliest stage to the final stage of the heating process.)

Answer #1

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(a)
How much heat transfer (in kJ) is necessary to raise the
temperature of a 0.150 kg piece of ice from −18.0°C to 128°C,
including the energy needed for phase changes? (Assume the
substance remains at a constant volume throughout each stage of the
heating process.)
kJ
(b)
How much time (in s) is required for each stage, assuming a
constant 21.5 kJ/s rate of heat transfer? (Enter your answers as a
comma-separated list. Enter your times in order from...

(a)
How much heat transfer (in kJ) is necessary to raise the
temperature of a 0.210 kg piece of ice from −24.0°C to 134°C,
including the energy needed for phase changes? (Assume the
substance remains at a constant volume throughout each stage of the
heating process.)
kJ
(b)
How much time (in s) is required for each stage, assuming a
constant 20.5 kJ/s rate of heat transfer? (Enter your answers as a
comma-separated list. Enter your times in order from...

How much heat transfer in kJ is necessary to raise the
temperature of a 0.347 kg piece of ice from -12.6ºC to 132.1ºC ,
including the energy needed for phase changes? (cice = 2090 J/kgºC,
cwater = 4186 J/kgºC, csteam = 1520 J/kg, Lvap = 2256 kJ/kg, and
Lfus = 334 kJ/kg)

How much heat transfer (in kJ) is necessary to raise the
temperature of 0.766 kg of ice from 0ºC to 32.6ºC? The specific
heat of water is 4186 J/kgºC and the heat of fusion for water is
334 kJ/kg.

How much total heat transfer is necessary to lower the
temperature of 0.215 kg of steam from 129.5 °C to -31.5 °C,
including the energy for phase changes? How much time is required
for each stage of this process, assuming a constant 895.0 W rate of
heat exchange? Give the times in the order that the stages
occur.

(a)
How much heat transfer (in kcal) is required to raise the
temperature of a 0.600 kg aluminum pot containing 2.00 kg of water
from 40.0°C to the boiling point and then boil away 0.850 kg of
water?
kcal
(b)
How long (in s) does this take if the rate of heat transfer is
600 W (1 watt = 1 joule/second (1 W = 1 J/s))?
s

(a)
How much heat transfer (in kcal) is required to raise the
temperature of a 0.550 kg aluminum pot containing 3.50 kg of water
from 25.0°C to the boiling point and then boil away 0.650 kg of
water?
(b)
How long (in s) does this take if the rate of heat transfer is
600 W (1 watt = 1 joule/second (1 W = 1 J/s))?

(a) How much heat transfer is required to raise the temperature
of a 0.750-kg copper pot containing 2.50 kg of water from 30.0ºC to
the boiling point and then boil away 0.750 kg of water?
(b) How long does this take if the rate of heat transfer is 555
W 1 watt = 1 joule/second (1 W = 1 J/s) ? Answer in seconds.

Calculate the heat transfer necessary to raise the temperature
of air, initially at 10°C and 100 kPa, to a
temperature of 27°C if the air is contained in an initial volume
with dimensions 3 X 5 X 2.4 m. The
pressure is held constant.
Ans. 753 kJ
I need it step by step, and the answer must match with the one
above !

How much heat is required to raise the temperature of 20.9 g20.9
g of water from −25 °C−25 °C to 155 °C? the answer are not 1.45
*10^5 and 10.956778 ! you have to calculate be broken 1.down into
five step! heart the ice from -25 c to 0 c
2.melting the ice
3.heating the liquid water from 0c to 100 c
4.100 c to 155 c
0.497 cal/ g c to do this calculate
All this answer 12298.782 and...

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