98 Answered Questions for the topic thermodynamics
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
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
How are cell death like apoptosis and entropy related?
In [Perspectives on Statistical Thermodynamics, Yoshitsugu... more
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
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
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
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
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 ?
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.
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?"