A 50.0 g sample of liquid water at 0.0°c ends up as ice at -20.0°c. How much energy is involved in this change.
1 answer:
Answer:
-4200J
Explanation:
Since q = mc∆T
where:
m = mass of the substance
c = specific heat capacity of the substance
∆T = change in temperature in Kelvin
but;
the specific heat capacity of water = 4.2J/K/g
Therefore q = 50*4.2*(253-273)
q = -4200J
Note: the negative is only used to indicate heat loss
Hope this helps
You might be interested in
Answer:
D.) All of the above
Explanation:
Anxiety can cause sweating, chaky hands, headaches etc
Answer:
1.60×10¹⁴ s⁻¹
Explanation:
When an electron jumps from one energy level to a lower energy level some energy is released in the form of a photon.
Answer:
=C₄H₄O₂
Explanation:
Given the empirical formula of a molecule, the he the quotient of the molecular mas and and the empirical mass=constant.
84.0 g/mol/mass of(C₂H₂O)=constant
=84/(12×2+1×2×16)
=84/42
=2
Therefore, the molecular formula is (C₂H₂O)₂=C₄H₄O₂
Answer:
I believe the answer is 0.100.
Explanation:
Hope my answer has helped you!
Answer: A.
Explanation:
Gravitational potential energy is due to the position of an object above Earth's surface. The object has the potential to fall due to gravity. Gravitational potential energy depends on an object's weight and its height above the ground (GPE = weight x height).
Weight= Mass
Height= Height
Hope this helps!
