191 Answered Questions for the topic thermodynamics

08/01/19

What type of heat transfer is a microwave?
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07/31/19

What is thermal radiation?
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07/31/19

What are the ways in which heat transfer can be modeled?
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07/30/19

What type of heat transfer is boiling water?
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07/30/19

What is the Rayleigh number?
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07/30/19

What type of heat transfer is baking?
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07/30/19

What is a heat engine?
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07/12/19

How are cell death like apoptosis and entropy related?
In [Perspectives on Statistical Thermodynamics, Yoshitsugu... more
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Thermodynamics Biochemistry Metabolism

07/10/19

What is an irreversible reaction?
There are reactions with large Delta G negative values. Why these reactions are irreversible? As in: out of 10 steps of Glycolysis, 3 are irreversible steps. I need an explanation for why they are... more
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07/08/19

What is entropy and why do we care?
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06/16/19

How does water buffer a sudden drop in temperature?
A property of water is that it is slow to heat and cool. According to my biology book, some energy from an increase in temperature would spent breaking hydrogen bonds, so that temperature does not... more
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06/09/19

Why don't membrane proteins move?
I understand that based on their tertiary structure, intrinsic proteins have hydrophobic non-polar R-groups on their surface and that they 'interact with the hydrophobic core of the cell membrane... more
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Thermodynamics Physics

05/26/19

thermodynamics question
400 g of air at 20°C is contained in a closed cylinder fitted with a piston The piston is allowed to expand, so that it moves with a mean force of 120N over a distance of 30mm. If the temperature... more
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05/13/19

Mathematical modelling
A cup of coffee at Co90 is kept in a room at Co25 . Two minutes later, the temperature of the coffee is Co75 . When will the temperature of the coffee reach Co50 ?
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Thermodynamics Chemistry

05/10/19

Need help with my question in chemistry

Calculate the ΔH of 200ml 1M HI acid mixed with 100ml 2M KOH solution?ΔHf KI/H2O= -57.5 KJ/Moleanswers:a - 11.5 KJb - 10.5 KJc - 12.5 KJd - 9.5 KJThanks.
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Thermodynamics Physics

05/07/19

Gravimetric and Volumetric Energy Density of a Battery
I have a thermodynamics homework question: "A common D size nickel metal hydride battery will supply 10,000 mAh of charge. What are the gravimetric and volumetric energy densities of this battery?"
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Thermodynamics Physics

04/16/19

Thermodynamics physics homework help
An engine using 1 mol of an ideal gas ini- tially at 21.7 L and 326 K performs a cycle consisting of four steps:1) an isothermal expansion at 326 K from 21.7 L to 42.1 L;2) cooling at constant... more
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Thermodynamics Physics

04/16/19

Physics homework help on thermodynamics

Part 1) Two moles of helium gas initially at 148 K and 0.47 atm are compressed isothermally to 1.27 atm.Find the final volume of the gas. Assume that helium behaves as an ideal gas. The universal... more
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Thermodynamics Chemistry

04/11/19

Hess's law question?
The combustion of ethane can be expressed through the equation below: C2H6(g) + 7/2O2(g) ---> 2CO2(g) + 3H2O(g) Using Hess’ law, prove that the formation reactions of ethane, carbon dioxide and... more
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Thermodynamics Organic Chemistry

04/10/19

Migratory aptitude in Baeyer-Villiger reaction?
In short, I do not understand how or why the migratory aptitude is as listed in every textbook I've read. Firstly, they talk about a positive charge being built up that is stabilised by the... more
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Thermodynamics Chemistry

04/06/19

Thermodynamics Chemistry Combined Metals
A sheet of gold weighing 10.0 grams and at a temperature of 18.0 °C is placed flat on a sheet of iron weighing 30.0 grams at a temperature of 55.6 °C. What is the final temperature of the combined... more
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Thermodynamics Chemistry

04/01/19

a piston contracts
a piston contracts when it loses 51.1 J of heat. its working against a pressure of .549 atm. initial volume is 70.1. what is the final volume if the change in internal energy is 988J?
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Thermodynamics Chemistry

03/14/19

energy of combustion of biodiesel?
Calculate the energy of combustion per gram of Bio Diesel (kJ/g) if 29.0 mL of water is placed in the test tube and the temperature changes from 22.9 ºC to 41.5 ºC. The initial mass of the spirit... more
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Thermodynamics Chemistry

03/14/19

Calculate energy of combustion of methanol?
Calculate the energy of combustion per gram of Methanol (kJ/g) if 29.7 mL of water is placed in the test tube and the temperature changes from 22.9 °C to 51.1°C. The initial mass of the spirit... more
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Thermodynamics Chemistry

03/14/19

Question asking for energy of combustion?
Calculate the energy of combustion per gram of Olive Oil (kJ/g) if 30.7 mL of water is placed in the test tube and the temperature changes from 22.9 ºC to 44.6 ºC. The initial mass of the spirit... more
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