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What mass of mercury would require 65 point 5 J of energy to raise the temperature of 20C to 100C The specific heat of mercury is point 140 JgC?
5.85 g
We have to use Q = m s @
Q - heat energy in joule ie 65.5 J
s - specific heat capacity ie 0.140 J/g/C
@ = @2 - @1 = 100 - 20 = 80 C
Just plug and you get the above 5.85 g nearly
Add:
Q = m•C•Δt, where Q is heat added, m is mass in grams, C is specific heat, and Δt is change in temperature.
Known:
Q = 65.5 Joules
C = 0.140 J/g•oC
Δt = 100oC-20oC = 80oC
Unknown: mass of Mercury in grams
Solution
m = Q/C•Δt
m = 65.5 J/(0.140 J/g•oC)(80oC) = 6 grams (rounded to 1 significant figure)
What else can I help you with?
Study Island Which substance would require the largest amount of energy to increase the temperature of 20 grams by 1.0 K?
The substance that requires the largest amount of energy to increase the temperature is the one with the highest specific heat capacity. Water has one of the highest specific heat capacities of commonly found substances, so it would require the largest amount of energy to increase the temperature of 20 grams by 1.0 K.
If a substance has a specific heat less than one would it take more or less heat to raise the temperature?
If a substance has a specific heat less than one, it would take less heat to raise its temperature compared to a substance with a specific heat of one. This is because substances with lower specific heat values require less energy to raise their temperature by a certain amount.
Would substances with high specific heat capacity also have high temperatures?
Specific heat capacity is the amount of energy or heat required to raise the temperature of a unit mass of a substance by one kelvin. So if the specific heat capacity is high then you would require more energy or heat to raise its temperature. The specific heat capacity does not really have anything to do with how much you can increase an objects temperature. IT HAS TO DO WITH THE ENERGY NEEDED TO INCREASE THE TEMPERATURE.
Why does the temperature drop more for some liquids than others?
The temperature drop varies among liquids due to differences in their specific heat capacities. Liquids with higher specific heat capacities require more energy to change their temperature, resulting in a smaller temperature drop when heat is removed. Conversely, liquids with lower specific heat capacities exhibit larger temperature drops when heat is extracted.
What term for reactions that require energy input?
Endothermic reactions require energy input to occur. The energy needed is absorbed from the surroundings, resulting in a decrease in temperature during the reaction.
What is the specific latent heat of fusion of mercury?
The specific latent heat of fusion of mercury is about 11.28 kJ/kg. This value represents the amount of energy required to change a unit mass of solid mercury at its melting point to liquid mercury at the same temperature, without changing its temperature.
What substances require the most energy to heat up a unit mass by 1celsius?
Substances with high specific heat capacities require more energy to heat up a unit mass by 1 degree Celsius. Water has one of the highest specific heat capacities of common substances, meaning it requires a significant amount of energy to raise its temperature. Metals like lead and mercury, on the other hand, have lower specific heat capacities and require less energy to heat up.
How will the composition of the objects affect the final temperature?
The composition of objects can affect the final temperature through their specific heat capacities, which determine how much heat energy is needed to raise their temperature. Objects with higher specific heat capacities will require more energy to increase their temperature compared to objects with lower specific heat capacities. Additionally, the mass of the objects will also play a role in determining the final temperature, as objects with higher masses will require more heat energy to increase their temperature.
Mercury has one of the lowest specific heats This fact added to its liquid state at most atmospheric temperatures makes it effective for use in thermometers If 257 J of energy are added to 0.450 kg?
The specific heat of a substance is the amount of energy needed to raise the temperature of 1 kg of that substance by 1 degree Celsius. Because mercury has a low specific heat, it heats up quickly when energy is added to it. In this case, 257 J of energy added to 0.450 kg of mercury would cause a significant temperature increase due to its low specific heat.
What effect does specific heat have on how easily an object changes temperature?
The higher the specific heat of an object, the more energy it requires to change its temperature. Objects with higher specific heat values require more heat input to increase their temperature compared to objects with lower specific heat values.
Materials with a high specific heat can absorb a lot of energy and show little change in temperature?
Yes. Specific heat capacity is the amount of heat energy required to change the temperature of the material, so a material with high specific heat needs a lot of heat energy for its temperature to go up.
Does raising the temperature require an input of energy?
Yes.
What most influences the amount of energy needed to change the temperature of a substance?
The amount of energy needed to change the temperature of a substance is most influenced by its specific heat capacity, which is the amount of energy required to raise the temperature of a given mass of the substance by 1 degree Celsius. Substances with higher specific heat capacities require more energy to change temperature compared to those with lower specific heat capacities. Additionally, the mass of the substance being heated also plays a role in determining the amount of energy needed.
Which would require a greater amount of heat water or iron?
To raise the temperature of both an equal amount, water would require more energy. In terms of the energy required to raise the temperature: iron = 0.45 joules / gram . kelvin water = 4.2 joules / gram . kelvin This is known as the specific heat capacity of a material
Study Island Which substance would require the largest amount of energy to increase the temperature of 20 grams by 1.0 K?
The substance that requires the largest amount of energy to increase the temperature is the one with the highest specific heat capacity. Water has one of the highest specific heat capacities of commonly found substances, so it would require the largest amount of energy to increase the temperature of 20 grams by 1.0 K.
If a substance has a specific heat less than one would it take more or less heat to raise the temperature?
If a substance has a specific heat less than one, it would take less heat to raise its temperature compared to a substance with a specific heat of one. This is because substances with lower specific heat values require less energy to raise their temperature by a certain amount.
Which item requires the least energy to increase its temperature lounge chair sand or water Explain your answer in terms of this item's specific heat?
Sand needs least energy to increase the temperature as its specific heat is very low compared to that of water. Water needs more energy to increase its temperature as its specific heat capacity is higher.
