A 1.00 liter solution contains 0.46 M hydrocyanic acid and 0.35 M potassium cyanide If 25.0 mL of water are added to this system
1 answer:
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Answer:
5.328Ibm/hr
Explanation:
Through laboratory tests, thermodynamic tables were developed, these allow to know all the thermodynamic properties of a substance (entropy, enthalpy, pressure, specific volume, internal energy etc ..)
through prior knowledge of two other properties such as pressure and temperature.
for this case we can define the following equation for mass flow using the first law of thermodynamics
where
Q=capacity of the radiator =5000btu/hr
m = mass flow
then using thermodynamic tables we found entalpy in state 1 and 2
h1(x=0.97, p=16psia)=1123btu/lbm
h2(x=0, p=16psia)=184.5btu/lbm
solving
Answer:
Roughly, an electric toaster oven on for 30 minutes uses: d) 2 million Joules of energy
Explanation:
An average toaster oven uses around 1.2 kW (or 1200 W) of power.
If it is on for 30 minutes, we can calculate how much energy it will use, knowing that energy equals power times time (that the machine is using power), taking into account units (kWh=kW*h and J=W*s):
As we assumed the power of the toaster, it is enough to say that an electric toaster oven uses roughly 2 million Joules, as there is only an 8% () difference between our calculated value and the rough estimation.