Thermodynamics
What is the difference between internal energy and
enthalpy?
a. Give a definition for each quantity
b. Give an example of when focusing on internal energy would be
especially relevant
c. Give an example of when focusing on enthalpy would be especially
relevant.
heat capacity at constant pressure
Cp=(dH/dT)
the difference between H(enthalpy) and U(internal energy) is
PdV=RT(in perfect gas)
Then, in real gas, how can I know the difference?
Calculate the enthalpy of reaction for the following reaction
using Hess's Law and the equations provided below.
Target Reaction: Sr(s)+C(graphite)+1 1/2 O2(g) ----->
SrCO3(s) H(degrees)=?
C(Graphite)+ O2(g)-----> CO2(g)
H(degrees)= -349kJ
Sr(s)+ 1/2 O2(G)-------> SrO(s) H(degrees)=
-592kJ
SrO(s)+CO2(g)-------> SrCo3(s)
H(degrees)= -234kJ
thermodynamics problem
show equations and steps clearly
A person's kitchen takes up 27 cubic meters of space. While
the apartment at 20°C, 1 atmosphere of
pressure, and 50% relative humidity, the person fills a pot on
the stove with 0.5 liters of water that is initially at 20°C. The
pot is accidently filled with more water than needed, and the
boiling pot is forgoten about on the stove. The person turns off
the pot on the stove before the pan...
There is an experiment that demonstrates the first law of
thermodynamics by using a tin can. The problem is I don't
understand why there is a work done. The link to that video is
https://youtu.be/jNPUCmkKiE4?list=WL&t=180 . Can someone
explain to me why the tin can suddenly imploded?
Thermodynamics
If you use a number from a table can you please show me a
picture from what table you use because that's what I'm mainly
confused about
1. (ans:159.50)
Saturated water vapor at 14.85 bar enters an insulated
throttling valve which drops the pressure to 1.50 bar. Determine
the temperature (oC) of the steam at the exit of the
valve.
Note: Give your answer to two decimal places.
Using the formulas given in class for continuous and compound
interest, show your calculated values for each investment
below.
A) Placing $875 in an account giving 13.5% APR compounded daily
for 2 years:
B) Placing $1000 in an account given 6.7% APR compounded
continuously for 2 years:
C) Placing $1050 in an account giving 4.5% APR compounded
monthly for 2 years:
D) RANK them in order from best (i.e. yielding the most
interest) to worst (hint: compare either $ or...
Using the elastic collision equations show the detailed steps in
deriving equation (1)
Using the plastic collision equations show the detailed steps in
deriving equation (2)
(1) v'B = (mA / mA + mB + m) * vA
(2) v' = (mA / mA + mB +m) * vA
m is mass attached to mB
use elastic collision equations to algebraically derive equation
1, and use plastic collision equations to algebraically derive
equation 2
m is a mass attached to...