Physics Answers

Calculate the entropy change for 3 kg of ice melting. Given Hf = 333.5 kJ/kgH20

In an adiabatic process, 550 J of net work is done on a gas to significantly reduce its volume. Determine the change in internal energy of the gas?

3.5 moles of CO2 in a container were expanded against an external pressure of 2.5 atm to a final volume of 37L. The initially pressure and temperature were 8 atm and 30⁰C, respectively. Calculate the final temperature and the work done for the process.

The plate of a parallel plate capacitor are 7mm apart and 1m²in area the plate are in vacuum if the pd applied is 100 volts across it's capacitor calculate the capacitance, charge on each plates and electric intensity

Determine the temperature (in Kelvin) for 1 mol of gas at 10 atm with a volume of 15L

The temperature of a metal having 7 g mass was raised by 117⁰C after 237.5 J of energy was supplied. Determine what is the metal's specific heat.

210 J of heat is added to a system having an internal energy of 58 J. Calculate the amount of the external work done by the system.

A gas in a closed container is added with 20J of heat. The lid to the container is then lifted for 20 cm with 2.5 N of force. Calculate how much the energy added to the system.

A 78 g container of containing a liquid solution is heated to 98⁰C. Another 3g of the same solution at temperature of 40⁰C is added to the container. Determine the final temperature of the solution?

A silver teaspoon at temperature 7⁰C is placed in a cup of hot coffee at temperature 93⁰C. If the teaspoon has a mass of 32 g and the hot coffee has 90g of mass, determine the final temperature of the silver teaspoon? Ccoffee = 1 cal/g.K Csilver = 0.0558 cal/g.K