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Thermodynamics Chemistry

04/07/20

Cooling/Heating Pad Chemistry Question

Hi I need help with someone to check if I have solved the following correctly :) Thanks in advanceQuestionAn cooling pad or heating pad in "pocket format" can conceivably consist of a plastic bag... more

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Thermodynamics Chemistry

03/30/20

Enthalpy of solution calculation (final one)

Hi!I have calculated the enthalpy of solution for anhydrous copper sulfate but I dont know if I did it right or wrong. The values needed to calculate have been given to me from a random student who... more

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Thermodynamics Chemistry

03/28/20

Calculation enthalpy of solution

Hi!I have calculated the enthalpy of solution for hydrous copper sulfate but I dont know if I did it right or wrong. Can someone please check for me?Calculations for solution of CuSO4 * 5... more

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Thermodynamics Chemistry

03/26/20

Enthalpy of solution for copper sulfate

Hi!I have calculated enthalpy of solution for hydrated copper sulfate and anhydrous copper sulfate, but the value for the hydrated copper sulfate differs from the value from anhydrous copper... more

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Thermodynamics Chemistry

03/25/20

Heat of solution

Hi!I will mix a salt with room-temperature water and 8 degree Celsius water. Then I will compare the heat of solution with each other. Does the temperature of the water from beginning affect how... more

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Thermodynamics Physics Specific Heat Capacity

03/17/20

Specific Heat Capacity

A 2KG block of copper at 100 degrees Celsius is put in a 5L pot of water at 20 degrees. Assuming no energy is lost to the surrounding environment, what is the final temperature of the mixture?

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Thermodynamics Chemistry Hess's Law Thermochemistry

03/12/20

Hess's Law, enthalpy,entropy,Gibbs free energy change Problem.

For the following unbalanaced reaction at 25°CPbCO3(s)-->PbO(s)+CO2(g)Calculate the standard enthalpy change, change in H° for the reactionCcalculate the standard entropy change, change in S°... more

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Thermodynamics Physics

03/10/20

Thermodynamics problem

Ice of x°C temperature is put into a cylinder of height H=30 сm. Then water (t1=10°C) is poured by the volume of ice. After the thermal equilibrium joint height increased by h=1 сm and became equal... more

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Thermodynamics Physics

02/29/20

Physics thermodynamics

How much the temperature of glass of water will rise after 2100 J heat. Volume of the glass is 250 cm^3? From what height should 1 l of water fall for its temperature to increase 1 degree celsius.... more

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Thermodynamics Chemistry Ap Chem Ap Chemistry

02/02/20

colligative properties

OS Chapter 11 Items9. Calculate the freezing point of a solution of 400.0 g of ethylene glycol (C2H6O2) dissolved in 600.0 g of water. A) 80.0°C B) -5.5°C C) 20.0°C D) -20.0°C E) 5.5°C Kf =... more

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Thermodynamics Chemistry

01/16/20

What's the concentration of low partial pressure oxygen (0.1 MPa O2 partial pressure ) in subcritical water (8 MPa total pressure) from 50°C to 250°C?

In a closed system, we pressurize and heat up the autoclave half filled with water to 8MPa with 99% CO2 and 1% O2, I wonder how much O2 is dissolved in water at different temperatures in a range... more

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Thermodynamics Chemistry

01/13/20

Change in internal energy calculation

What is the change in internal energy, ΔE, when 1.57 moles of a diatomic ideal gas is heated from 89°C to 306°C? How would the value be different if the ideal gas was monatomic?

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Thermodynamics Chemistry Physics Integral

12/10/19

Thermodynamics and Integral? I think I was approaching it wrong, and I don't know where to begin.

I started using the idea that delta U = W because it is adiabatic for the first expansion. I was told by a peer to use w = integral of PdV equation, but someone else also suggested that W=nCdeltaT... more

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Thermodynamics Frequency Waves

12/07/19

Frequency and wavelengths

WEGT( Hank-FM) operates at a radio frequency of 99.9MHz a) what is the wavelength of this radiation (hint:1MHz= 10^6Hz)b) What is the energy of the radio frequency in the problem above in kJ?

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Thermodynamics Chemistry

11/20/19

Thermochemistry

What is the change in temperature when 3.00 grams of ammonium nitrate is dissolved in 100 mL of water? -2.29 oCGiven the change in the temperature from adding 3.00 grams of ammonium nitrate to... more

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Thermodynamics Chemistry

11/13/19

Coffee Cup Calorimetry

When 0.876 g of CaCl2(110.98 g/mol) is added to 95.0 gof water at 22.4°C in a ‘coffee-cup’ calorimeter, the temperature of the resulting solution increases to 29.7°C. The specific heat capacityof... more

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Thermodynamics

08/24/19

Related to first law of thermodynamics

An insulated tank initially contains 0.25 kg of a gas with an internal energy of 200 KJ/kg. Additional gas with an internal energy of 300 KJ/kg and an enthalpy of 400 KJ/kg enters the tank until... more

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Thermodynamics Physics

08/22/19

What can be the answer

Q.1 choose correct optiona) Only heat can cross the boundary of control surface.b) Heat and Work can cross the boundary of control surface.c) Mass as well as heat and work can cross the boundary of... more

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