Please see the attached file for the fully formatted problem(s).

Problem 1:

> A piece of wood is 2ft x 2ft x 0.25 ft ----- the hot plate is also 2ft x 2ft square
> A wet piece of wood is placed on a steam heated hot plate ---- the dry weight of the wood is 10 lbs ----- the weight of the water in the wood is 6.5 lbs
> 450 psi saturated steam is used to heat the hot plate ---- the steam is approx. 456 degrees F and has an enthalpy of approx. 1202 btus/lb
> Given are Cp values for wood at .57 btus/lb/oF; water vapor at .46 btus/lb/oF; and water liquid at 1.00 btu's/lb/oF
> Assume no air flow over the wood
> If the steam flow to the hot plate is 25 lbs steam per minute and it is assumed that heat transfer from the hot plate to the wood is 100% efficient:

a) Determine the total energy need to heat the wood to completely bone dry?
b) Determine the time needed to completely dry the wood?
c) Determine how much condensate would be produced on the discharge end of the hot plate (assuming no other radiative or convective losses)
d) From a Physics stand point, would the total energy needed in this case be the amount of work performed?? If not, how would I calculate the work?

Steam inlet condensate out

Hot Plate

Problem 2:

> Exactly the same as above but:

- in this case the heat transfer from the hot plate to the wood is only 70% efficient

Commercial cold-packs consist of solid ammonium nitrate and water. Ammonium nitrate absorbs 330 J of heat per gram dissolved in water. In a coffee-cup calorimeter, 2.00 g of ammonium nitrate are dissolved in 75.0 g of water at 30 degrees Celsius. Assuming that all of the heat is lost from the water, what is the final temperatu

In moving out of a dormitory at the end of the semester, a student does 1.6 x 10^4 J of work. In the process, his internal energy decreases by 4.2 x 10^4 J. Determine each of the following quantities (including the algebraic sign): (a)W, (b) delta U, and (c)Q.

Please work the following practice problem. Being very thorough. Explain how you intend to approach the problem, important information and or equations that are relevant to solve/understand the thought process.
Consider a situation in which the surroundings heat a system and the system contains a gas which expands against a

A class of 12 students taking an exam has a power output per student of 126 W. Assume that the initial temperature of the room is 19.5°C and that its dimensions are 6.20 m by 14.4 m by 3.30 m. What is the temperature (in °C, do not enter units) of the room at the end of 63.0 min if all the heat remains in the air in the room a

1. How much energy (In kcal) is required to raise the temperature of 1 L of water from 20 to 100C, and then turn it to steam at 100C?
2. A 2 kg rod of aluminum (c = 0.9 kJ/kg-C) at 90C is dropped into 10 L of water at 10C. What is the final temperature of the mixture?
3. A 0.2 kg block of an unknown metal at 50C is immers

A 58.0 kg ice-skater moving at 6.25 m/s glides to a stop. Assuming the ice is at 0°C and that 53.5 percent of the heat generated by friction is absorbed by the ice, how much ice melts?

The DH of combustion of CH4 is -882kJ/mol.How many grams of water, which has a specific heat of 4.184 J/g-oC can be heated from 30oC to 95oC by the heat produced in the combustion of 2.25 mol of CH4?

This is a problem we did in lab that dealt with measuring specific heat.
Please provide answers along with solutions to the following questions.
These problems mainly deal with specific heat capacity.
See attached file for full problem description.
A. What is the energy gained by water? Include measurement uncertainty?

When a system is taken from state a to state b in the figure View Figure along the path acb, the amount of heat that flow into the system is 95.0 J and the work done by the system is 57.0 J.
A) How much heat flows into the system along path adb if the work done by the system is 10.0 J?
B) When the system is returned from