Physics Help - Thermodynamics?
The lid of a pressure cooker forms a nearly airtight seal. Steam builds up pressure and increases temperature within the pressure cooker so that food cooks faster than it does in an ordinary pot. The system is defined as the pressure cooker and the water and steam within it. If 2.0 g of water is sealed in a pressure cooker and then vaporized by heating, and 5433 J must be added as heat to completely vaporize the water, what is the change in the system’s internal energy?
Physics help, thermodynamics?
What state do you go to school in? Different schools teach different ways of solving a problem like this...
Physics: Thermodynamics Help!?
Can someone help me with 2 physics questions? 1) Note: the molarmass of He is 4 g/mol. Report temperature in Kelvin and speed in m/s. Boltzmann’s constant is 1.38066 × 10−23 J/K. Avogadro’s number is 6.02214 × 1023 /mol. Determine the temperature at which the rms speed of an He atom equals 280 m/s. Answer in units of K. 2) What is the rms speed of He on the surface of a certain star, where the temperature is 4766 K? Answer in units of m/s. Thank you!
Physics help - thermodynamics?
When the gases have reached thermal equilibrium, each degree of freedom holds (1/2)kT of energy, A molecule of H2 has 5 DoF, so 2 mol of H2 has 2N(5/2)kT=(10/2)NkT J of thermal energy (N=Avogadros Number.) A molecule of He has only 3 DoF so 4 mol of He has 5N(3/2)kT=(15/2)NkT. Clearly the He contains more thermal energy.
Physics help please!!! Thermodynamics?
i see the problem the question you are asking about has to be the worst possible way to teach thermo ever the best I can do for you is tell you the laws of thermo, but the word game is absolutely rediculous and has nothing to do with scientific thought The zeroth law states that if two systems are in thermal equilibrium with a third system, they are also in thermal equilibrium with each other. The first law of thermodynamics observes the principle of conservation of energy The second law of thermodynamics is an expression of the tendency that over time, differences in temperature, pressure, and chemical potential equilibrate in an isolated physical system. The third law of thermodynamics is a statistical law of nature regarding entropy: The entropy of a perfect crystal approaches zero as temperature approaches absolute zero.
Physics help please thermodynamics?
m[1] = mass of steam, m[2] = mass of ice m[1] L[s] + m[1] C (100 - T) = m[2] L[i] + m[2] C T (m[1] + m{2])CT = m[1] L[s] + 100m[1]C - m[2]L[i] T = {m[1]L[s] + 100m[1]C - m[2]L[i]} / (m[1] + m[2])C T = (0.023 x 22.6 x 10^5 + 100 x 0.023 x 4186 - 0.142 x 33.5 x 10^4) / (0.023 + 0.142) x 4186 T = 20.3 deg C
Physics Thermodynamics help please?
When 50 g of ice at -10 ∘ are added to 1.0 kg of water at 15 ∘, is there enough ice to cool the water to 0 ∘? I know the answer is no but how do I Find the final temperature of water? Please help! Thanks!
Physics Homework Help: Thermodynamics?
Having a little trouble with this homework problem. I have about half of it finished, but having difficulties with the last two parts: A sample of a monatomic ideal gas occupies 5.00 L at atmospheric pressure and 300 K (point A in the figure below). It is warmed at constant volume to 3.00 atm (point B). Then it is allowed to expand isothermally to 1.00 atm (point C) and at last compressed isobarically to its original state. (a) Find the number of moles in the sample. I found the answer to be: 0.203 moles (b) Find the temperature at point B. I found the answer to be: 900K (c) Find the temperature at point C. I found the answer to be: 900K (d) Find the volume at point C. I found the answer to be 15 L (0.015m^3) (e) Now consider the processes A → B, B → C, and C → A. Describe how to carry out each process experimentally. Filled this question out already (f) Find Q, W, and ΔEint for each of the processes. When I try to calculate Eint for A -> B, I'm using nCv(delta t), with Cv = 3/2 R, but when I do this and submit the answer, I'm being told "Your response is off by a multiple of ten." (My answer that I was getting was 1518.97 for A -> B) (g) For the whole cycle A → B → C → A, find Q, W, and ΔEint. Any help for these last two parts would be greatly appreciated, I also attached a photo of the figure if it helps. Thanks!
Is thermodynamics Physics or Chemistry?
Thermodynamics, as the name clearly indicates, is the science of relationships between thermal (heat) and mechanical (work) energies. The relationships can be applied on many different systems and phenomena, including both physical and chemical phenomena. Physical one, like steam engine and chemical like fuel cells, chemical reactions and batteries. Therefore, thermodynamics belongs to both physics and chemistry, but it is mostly applied to physical phenomena.
I am studying thermodynamics in physics. How much will it help me when I will study thermodynamics in chemistry? (Thermodynamics as referred in the JEE syllabus)
Chemistry mostly focuses on enthalpy and entropy and how they drive reactions, as opposed to physics which discusses heat and work. If you understand thermodynamics it helps with both, whereas if you understand how to play with the formulas and don't really get a good feel for thermodynamics itself you're unlikely to see any benefit. Later on, if you study Pchem, you end up learning how to relate physical thermodynamics and chemical thermodynamics, so you can (for example) pump heat into or out of a closed room and figure out the change in enthalpy of the gas