Answer:
31.3 g
The answer is higher than the true answer.
Explanation:
By neglecting the heat lost by other processes, the energy conservation states that:
Qcooling + Qevaporate = 0
The cooling process happens without phase change, so the heat can be calculated by:
Qcooling = m*c*ΔT
Where m is the mass, c is the heat capacity (cwater = 4184 J/kg.K), and ΔT is the temperature variation (final - initial).
The evaporate process happen without changing of temperature (pure substance), and the heat can be calculated by:
Qevaporate = m*L
Where m is the mass evaporated and L is the heat of evaporation (2340000 J/kg).
0.350*4184*(45 - 95) + m*2340000 = 0
2340000m = 73220
m = 0.0313 kg
m = 31.3 g
Because of the assumptions made, the real mass is not that was calculated. There'll be changing mass when the coffee is cooling, and there'll be heat loses by other processes because the system is not isolated. Also, the substance is not pure. So, there'll be more factors at the energy equation, thus, the answer is higher than the true answer.
Explanation:
What would you expect to find?
- The masses of the reactants would be equal to the masses of the product.
Why?
- This is due to the law of conservation of matter which states that matter is neither created nor destroyed in an isolated system but converted from one form to the other.
How is this related to balancing your equations?
- This is why during balancing of equations, we must ensure that the number of atoms in the reactant side must be equal to the number of atoms in the product side.
Gravity force is at least partially responsible for changing the energy of an object pushed off an edge.
Explanation:
- Gravity or gravitation, it is a phenomenon by the things with mass or energy including stars, galaxies, planets, and even light are taken to one another.
- The gravitational pull of the Universe's initial gaseous matter caused it to begin to coalesce and form stars, which caused the stars to gather together into galaxies, and gravity is responsible for all of the Universe's large-scale structures.
- Gravity has an unlimited range, but its effects are becoming ever weaker as items get away further.
Answer:
co2 is a compound.
Explanation:
Oxygen(O) is an element having atomic number 8 and mass number 16.
Carbondioxide is a compound formed by burning of carbon and organic compound and it is a colorless and odorless gas.
O2 is the molecular form of Oxygen.
Cobalt(Co) is an element having atomic number 27 and mass number 59.
