Molecular Physics | Thermodynamics Answers

The specific heat of Zn is 0.096 cal./g C. Determine the energy required to raise the temperature of 250 g of ZN from 20 degree C to 150 degrees C

How much heat energy is required to raise the temperature of 0.365 kg of copper from 23.0 ∘C to 60.0 ∘C? The specific heat of copper is 0.0920 cal/(g⋅∘C) .

I have a few questions in regards to physics, heat, and temperature

1. How much energy must be removed from 5.5 kg of liquid lead at 327oC to produce a block of solid lead at 327C.

2. How many KJ of energy is required to melt exactly 100g of ice initially at -4.00C? Assume no loss of energy to surroundings.

Thank you

Hi, I have multiple questions on Physics, as I am struggling at physics. These are my questions.
1. A hot block of iron does 50 kJ of work on a cold floor. The block of iron also transfers 20 kJ of heat energy to the air. Calculate the change in energy (in kJ) of the iron block.

2. A chef vigorously stirs a pot of cold water and does 150 J of work on the water. The water also gains 75 J of thermal energy from the surroundings. Calculate the change in energy of the water.

And can you guys please tell me how do you calculate it and what theory applies to me and all the other basics.
Thanks

At the intersection of the Figure below, a yellow subcompact car with mass 950 kg
traveling east collides with a red pickup truck with mass 1900 kg that traveling north and
ran a red light. The two vehicles stick together as a result of the collision, and the
wreckage slides at 16.0 m/s in the direction 24.0o east of north y (north). Calculate the
speed of each vehicle before the collision. The collision occurs during a heavy rainstorm;
you can ignore friction.

Show that entropy S and thermodynamic
probability W for a completely ordered
system is S = k in W.
Define entropy. Calculate the change in entropy
when two gases kept in separate containers are
allowed to mix.

Water at a temperature of 15°C produces ice cubes at a temperature of −5°C. Water is taken in at the
rate of 1 kg every 7 minutes and the input power to the machine is 300 W. The specific heat capacity of
water is 4187 Jkg−1K

−1, the specific heat capacity of ice is 2100 Jkg−1K

−1 and the specific latent heat of

fusion is 335 Jkg−1
i) Calculate the heat energy extracted per kg of ice produced
ii) Calculate the thermal efficiency of the ice making machine.

The length of Lead piping in the plant is 50 m long at a temperature of 160C. When hot water flows
through it the temperature of the pipe rises to 800C. The coefficient of linear expansion of lead is
29 10-6 0 K-1
i) Determine the change in length of the hot pipe.
ii) Determine the compressive force induced in the pipe if it is rigidly held and expansion is
prevented.

A 80.0-kg student climbs up a tree. The gravitational potential energy of the student at this point is 2.00 x 10(3) J. How high is the student above ground?

a scientist uses a gamma degree scale for measuring temperature . in this scale water melts at 10° and boils at 130°. the scientist measures the temperature at which sodium melts to be 127°. express this in kelvin