Molecular Physics | Thermodynamics Answers

The label on a stock bottle of acid reads: 56% by mass and 1.25 specific gravity. If the molar mass of the acid is 56, what is the concentration in
grams/dm3
?

4. determine the initial temperature of 225 g of water that absorbs 300. J of heat and ends at a temperature of 87.5 oC.

how much heat is needed to bring 20g of water from 30 degree C to boiling point?(specific heat capacity of water =4200jkg-10c-1)

Tin melts at 232 under standard atmospheric pressure.express this temperature in kelvin?

an ungraduated mercury thermometer attched to a millimeter scale reads 22.8mm in ice and 242mm in steam at standard pressure.what is the millimeter read when the temperature is 20 degree C?

an engine absorbs 2000J of heat from a hot reservoir and expels 750J to a cold reservoir during each operating cycle. what is the efficiency of the engine?

The atmospheric pressure at sea level is about 1 x 10^5 Pa. What is the force exerted on the top of a office desk, 152 cm long and 76 cm wide?

When a 100-m metal pipe is heated from 20°C to 43.5°C, it lengthens by 4.00 cm. What type of pipe is this?
brass
aluminum
gold
copper

At what temperature will the root-mean-square speed of oxygen molecules have the value of 640 m/s? 1 kilomole of oxygen has a mass of 32kg.

A 0.5kg piece of metal (c = 600/kgK) at 300 degree celcius is dumped into a large pool of water at 20 degrees celcius. Assuming the change in temperature of water to be negligible, calculate the overall change in entropy for the system