86000j
0.385 Joules/Gram Celsius is the specific heat of copper. So, q(Joules) = mass * specific heat * change in temperature q = (200 g Cu)(0.385 J/gC)(30 C - 150 C) = - 9240 Joules -------------------------amount of heat dissipation ( answer can be positive )
Assuming the change takes place under the pressure of 1 atmosphere, the heat lost will be 1000 calories or 1 kCal.
0.450 kg = 450 grams q = mass * specific heat * change in temp. q = (450 grams)(4.180 J/gC)(20 C - 35C) = - 2.8 X 10^4 Joules of heat lost
3.3 Joule (it follows the equation: Heat loss=mass*specific heat*temp. difference)
Celsius measures temperature.
calulate the amount of heat released when 25 gram of water at 25 degrees Celsius cools to 0.0 degrees celsius
The answer is 53,683 kJ.
If a person ties a piece of copper wire at the end of the exhaust pipe on a vehicle the copper is going to heat up. When the copper heats up it will turn a rainbow of colors.
0.385 Joules/Gram Celsius is the specific heat of copper. So, q(Joules) = mass * specific heat * change in temperature q = (200 g Cu)(0.385 J/gC)(30 C - 150 C) = - 9240 Joules -------------------------amount of heat dissipation ( answer can be positive )
Heat the liquid to boil off excess water and the copper nitrate will crystalise out of the solution as it cools. Then filter to separate the crystals from the liquid.
Q=m s dT m = s dT/Q = 0.00924 X (100-25.3)/125 = 0.0055122 g
heat will flow from the iron to the water until both are the same temperature
Assuming the change takes place under the pressure of 1 atmosphere, the heat lost will be 1000 calories or 1 kCal.
Where are you getting this specific heat number. With the other numbers there is no cancellation.
0.450 kg = 450 grams q = mass * specific heat * change in temp. q = (450 grams)(4.180 J/gC)(20 C - 35C) = - 2.8 X 10^4 Joules of heat lost
3.3 Joule (it follows the equation: Heat loss=mass*specific heat*temp. difference)
These are not temperature numbers but specific heat numbers. They mean that it takes 4.184 Joules and 0.387 Joules respectively to raise water and copper of one gram by one degree celsius. So, as you can see, it takes a lot more heat to raise the temperature of water than it does of copper. Water has a very high specific heat.