Expansion work against constant external pressure: w=-pex Δ Δ V 3. The attempt at a solution . I tried following that. Because Vf>>Vi, and Vf=nRT/pex, then w=-pex x nRT/pex=-nRT (im assuming n is number of moles of CO2?). 1 mole of CaCO3 makes 1 mole of CO2, so plugging in numbers, I get 8.9kJ, although I dont use the 1 atm pressure at all
*heat transfer energy, As it always flow from higher temperature to lower temperature till it reach the thermal equilibrium.
example: -friction.
- collisions.
- the hot cup which's hotter than your hand✋will transfer heat in your hand. and a cold piece of ice which's colder than your hand to causing the heat transfer out of your hand .
*temperature ️ depends on the move of particle and we have a different shape of motion like:
translational motion.
rotational motion.
vibrational motion.
when the temperature:
increases it has more kinetic energy and faster moving particles and the object expanded which known as (thermal expansion).
decreases it has less kinetic energy and slower moving particles.
As kinetic energy is 1/2 mV².
example: -the mercury in thermometers.
*Absolute zero :
The theoretical temperature at which substances possess no thermal energy, equal to 0 K, −273.15°C, or −459.67°F.
*specific heat "c" :
is essentially a measure of how thermally insensitive a substance is to the addition of energy.
c=Q/m∆T
where Q is energy .
note water has a higher specific heat, and lower temperature.
*conduction <em><u>example</u></em> When the stove is turned on, the skillet becomes very hot due to the conduction of heat from the burner to the skillet.
They will interfere to create a crest with an amplitude of 2
Answer:
solvent: the substance in which a solute dissolves to produce a homogeneous mixture. solute: the substance that dissolves in a solvent to produce a homogeneous mixture.
Explanation:
eSo basically thats aswer
Answer: The angle between the two colours when they emerge is 0.4°
Explanation:
The refracting angle for different colors knowing its refractive index can be calculated using Snell's law.
Ni × sin α = Nr × sinβ
Where Ni is the refractive index for light in incident medium
α is the angle the incident makes with normal
Nr is the refractive index for light in the refractive medium
β is the angle the refracted makes with the normal
Making β the subject
β = arcSin ( Ni × sinα)/Nr
For Orange color
The value of refractive index in polystyrene medium is 1.490 ,that is Ni= 1.490
α is 30° and Nr is the refractive index of air = 1
β = arcSin(1.490×sin30°)/1
β= 48.15°
For Blue color
The value of refractive index in polystyrene medium is 1.499,that is Ni= 1.499
α is 30° and Nr is the refractive index of air = 1
β = arcSin(1.499×sin30°)/1
β= 48.55°
The angle between the two colours is the difference in the angles of their refracted rays
48.55-48.15=0.4°
