Recent content by MaiteB

Homework Statement A mixture of two ideal gases, the first one atomic and the second two atomic are put in normal conditions in a calorimeter with volume 1 liter hermetically closed. After it is given 10J thermal energy the mixture temperature is grown 14.2 K. Find the molar specific heat for...

I am writing my solution: pV=nRT=>n=(1.8*10^5*0.05)/(8.31*293)=3.7 1.8/293=2/x=>x=325.5555 U= 5/2* 3.7*8.31*(325.56-293)=2500, but in my book the answer is 2537J

Ok but how can I find the U with this compound of gases like air?

I corrected it. t-time, A-work, P-power

Homework Statement An electrical resistance has a power of 1 kW. It is put inside a container that has 10 liters water. The water is in temperature 20C with pressure 1 atm. Find the time to warm the water to the temperature 120C Homework Equations A=P*t The Attempt at a Solution I thought to...

Homework Statement A car rubber has the volume 50 liters when it is bloated in a pressur 1.8 atm and in a temperature 293 K. After some hours of journey as an effect of friction the pressure will become 2atm. Find the change of internal energy of the air inside the rubber (U) Homework...

The sphere with its energy

The answer is 16.5 g, if it helps

Ek=400J Next should I write mcT=Ek? How can I find the difference in ice temperature?

How can I find the ΔQ?

No I haven't

ok, but what should I do next?

Homework Statement The sphere of lead with mass 2kg and velocity 20m/S hits a block of ice and is stuck in it. Find the mass of ice that melts during the hit. The initial temperature of the sphere is 293 K and c=128J/kg*grade. Homework Equations m1v1=m2v2 The Attempt at a Solution I thought...

pV=nRT Thanks a lot

Homework Statement A container has neon gas in the temperature 273 K. We heat the container to the temperature 373 k, keeping the volume constant. Find the average velocity of the molecules of neon before and after the heat. Homework Equations U=3/2vRT The Attempt at a Solution I thought to...