191 Answered Questions for the topic thermodynamics

Thermodynamics

02/01/18

one mole of an ideal monatomic gas at temperature T expands slowly according to the law p/v =constant .if the final temperature 2T heat supplied to the gas is
It's a question of advance level of topic Heat and thermodynamics
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01/22/18

Hi! Are Delta Hsolution and Delta Hreaction the same value in dissolution?
Hi! Are Delta Hsolution and Delta Hreaction the same value in dissolution? Please help! I know qrxn and qsolution are opposite(signs). I'm confused as to if DeltaHsolution and DeltaHreaction are... more
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Thermodynamics

11/05/17

thermodynamics
A 30g lead bullet at 30°C was fired at a speed of 240m/s into a large block of ice at 0°C, in which it embeds itself l. What quantity if ice is melted.
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Thermodynamics

11/04/17

A civil engineer is to lay two long steel arches are 518m each, and the environment has night and day temperature of -20°C and 30°C.
A civil engineer is to lay two long steel arches are 518m each, and the environment has night and day temperature of -20°C and 30°C. What spacing would the engineer leave between the arches.     more
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Thermodynamics

10/01/17

why entropy can not be negative ?
 why the entropy of a universe can not be negative?  
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Thermodynamics Science Chemistry Physics

07/21/17

Solve chemical reaction for temperature of exothermic reaction (thermite)
Hi there, I I have a question about Physics/ chemistry.If I have a bag of iron oxide(lll) and powdered aluminium in the ratio of 3:1 totalling 72g, with 54g being Fe2O3 and 18g of 2Al, what would... more
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05/13/17

Thermodynamics problem regarding fugacity and fugacity coefficient.
    Hey, I'm at my wit's end when it comes to thermodynamics. Apparently, I was given this little assignment from my lecturer to solve it at home. I need help in solving this, really x_xA binary... more
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Thermodynamics Chemistry Chem 1211

03/28/17

Thermodynamics problem! Please help!
A student takes a Styrofoam cooler in fills it with 2.00 L of water. He then adds a small amount of sodium to it and it reacts according to the equation below. The initial temperature of the water... more
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Thermodynamics Chemistry

03/27/17

Thermodynamics problem. Please help!!
 A student takes a Styrofoam cooler in fills it with 2.00 L of water. He then adds a small amount of sodium to it and it reacts according to the equation below. The initial temperature of the water... more
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12/19/16

Thermodynamics
A gas expands from 3 dm3 to 5 dm3 against a constant external pressure of 3atm. The work done during expansion is used to heat 10mol of water at 290 K. Calculate the final temperature of water. Sp.... more
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Thermodynamics

12/08/16

Which of the following does not determines the thermodynamical state
The options are (a) temperature (b) work (c) pressure (d) volume
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Thermodynamics Chemistry Volume Pressure

11/26/16

Pressure Volume diagram doubt
In P-V graph of an ideal gas, there is a straight line with negative slope. How can we calculate the maximum temperature from the graph? Note:The graph is not a rectangular hyperbola but a... more
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Thermodynamics Chemistry Chemisrty Enthalpy

11/23/16

Calculating Enthalpy in a Calorimeter Experiment
When 25.0 mL of 1.0 M H2SO4 is added to 50.0mL of 1.0M of NaOH at 25.0 degrees C in a calorimeter, the temperature of the aqueous solution increases to 33.9 degrees C. Assuming that the specific... more
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Thermodynamics Science Physics Formula

09/15/16

What does this mean? Physics Help!!!!!!!!!!!!!!!!!!!
A weightlifter holds a 150 kg weight 2 m from the floor. Calculate the speed which the weight hits the floor when dropped. You may assume that no energy leaves the system, and that the... more
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Thermodynamics Chemistry Physics Math Help

06/08/16

I need help with some thermochemistry questions, PLEASE, PLEASE HELP!
I've spent all day on the following questions and can't seem to get them right. If anyone would be willing to provide a break down with the answer that would be greatly appreciated. I just want to... more
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Thermodynamics Physics Heat Efficiency

05/25/16

Heat needed? Energy needed?
a. Calculate the amount of heat needed to warm 24.6 kg of water from a room temperature of 20.0°C to 60.0°C for use in a dishwasher.b. If the water heater has an efficiency of 61%, how much energy... more
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Thermodynamics Physics

05/25/16

Latent heat of vaporization?
How much more heat is needed to boil 5.0 kg of water than is needed to melt it? The latent heat of vaporization for water is 2260 kJ/kg, and the latent heat of fusion is 333 kJ/kg. 
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Thermodynamics Physics Temperature

05/24/16

Final temperature?
If 0.20 kg of iron at 100°C is added to 1.00 kg of water at 20.0°C, what is the final temperature of the system?   Please explain
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Thermodynamics Physics

03/27/16

8 moles of gas is at 22 degrees C and has a volume of 2.0 m^3. If it goes through an isobaric expansion to twice its volume.
What is the change in internal energy, how much work is done by the gas, and how much heat flowed into or out of the gas.
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Thermodynamics

02/16/16

if a water/ice mixture is 0 degrees can the glass container be 0 degrees as well
if a water/ice mixture is 0 degrees can the glass container be 0 degrees as well
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Thermodynamics

02/01/16

Heat Transfer Problem
A hollow spherical iron container whose outer diameter is 95 cm and thickness is 4 mm is filled with iced water at 0ºC. If the outer surface temperature is 1ºC, determine the approximate rate of... more
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Thermodynamics

01/22/16

Between temperature and pressure of the system ,which is easy to fix and why?
if you were to fix temperature and pressure , which one will you choose and what is the  reason for your choice?
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Thermodynamics

01/22/16

why is it necessary to have a refrigerant of high critical pressure
i just wanna know the effect of critical pressure on the properties of refrigerant
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Thermodynamics Math Chemistry Physics

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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Thermodynamics Math Science Chemistry

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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