What’s the question or problem ?
The answer is C .Y on the chart. im 100% its right . hope this helps .
Burning a substance means that you have damaged it, and this is irreversible, which is a quality that chemical changes have. Burning a substance also changes the substance into ash, which makes it a chemical change as the substance has been formed into something else.
I hope this helps!
Answer:
it speed is 264 kinetic energy
Answer:
75.6J
Explanation:
Hi!
To solve this problem we must use the first law of thermodynamics that states that the heat required to heat the air is the difference between the energy levels of the air when it enters and when it leaves the body,
Given the above we have the following equation.
Q=(m)(h2)-(m)(h1)
where
m=mass=1.3×10−3kg.
h2= entalpy at 37C
h1= entalpy at -20C
Q=m(h2-h1)
remember that the enthalpy differences for the air can approximate the specific heat multiplied by the temperature difference
Q=mCp(T2-T1)
Cp= specific heat of air = 1020 J/kg⋅K
Q=(1.3×10−3)(1020)(37-(-20))=75.6J