39 Answered Questions for the topic Heat

03/19/16

finding final temperature from the heat of a reaction.
1.20 grams of Mg is burned producing MgO. The heat from the reaction is used to warm 500 grams  water at 5 degrees Celsius. Find the final temperature of the water.
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07/10/15

Physics: Thermodynamics (ice)
If a 0.06247 kg ice cube initially at 0.00 C is allowed to melt in a Styrofoam cup holding 0.497 kg of water at 10.0 C , what is the total entropy change for this process?
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07/10/15

Physics: volume expansion, temperature (thermodynamics?)
Rivets can be cooled before they are put in place, thus when they reach equilibrium temperaturethey are more firmly fixed in place.   If the volume expansion of iron is 35.0 X 10-6 K-1 what... more
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07/09/15

Physics: Calorimetry
Calorimetrya. How much heat needs to be taken from 0.5 kg of ethyl alcohol as a gas at its boiling point of 78.0 C to a solid at its freezing point -114 C if the latent heat of vaporization is... more
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07/05/15

Physics: latent heat of fusion
If you want to find the latent heat of fusion, you take a cup with 0.755 kg of water at 30.00 C and drop 0.0850 kg of ice initially at 0.000 C and it all reaches an equilibrium temperature of 19.00... more
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07/03/15

Wha is the final temperature of this mixture?
I'm reviewing some practice thermodynamics questions for my upcoming physics exam but I can't figure out how to set these up properly.   1. If you mix two parts hot 80° C water with one part 10°... more
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Heat

03/05/15

does metal conduct heat quickly
Does metal conduct heat quickly true or false 
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02/22/15

What is the mass of a sample of water that receives 2000 calories and its temperature rises from 60 degrees C to a boil?
This is one of the questions on my review guide my teacher gave me and I have a test tomorrow and have no idea how to find the answer to this question! If someone could give the formula to find... more
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Heat Physics

12/01/14

Specific Heat
There are 12 cans of pop in cooler, each can weighs .35kg, and the specific heat for pop is 3800. The temperature in the cooler is 5C.  Someone places a water mellon in the cooler that has a mass... more
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11/21/14

Thermochemistry: Heating water with Methane
I'm stuck on this one   How many grams of methane must be combusted to heat 1.00 kg of water from 25.0 °C to 90 °C, assuming H2O(l) is the product of the reaction and no heat is lost to the... more
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11/21/14

Thermochemistry
I'm not sure what I need to do here...   If 25.0 g of ethanol at 5.0 °C is mixed with 50.0g of ethanol at 75.0 °C, what with the final temperature of ethanol be, assuming no heat is lost to the... more
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10/12/14

How many homes could be heated from this source assuming heating requirements of 40 kWh/d per house?
A thermal power plant produces 82 MWh/d of excess heat energy. How many homes could be heated from this source assuming heating requirements of 40 kWh/d per house?
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06/23/14

A 10.0-gram sample of H2O(l) at 23.0°C absorbs 209 joules of heat. What is the final temperature of the H2O(l) sample?
Find the final temperature go the H20(l) sample.
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Heat Physics

02/02/14

why does one cool faster
58. Which has the higher specific heat capacity: an objectthat cools quickly or an object of the same mass thatcools more slowly?
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