Hello!
The energy required to melt 13 kg of ice at 273k is 5040000 J
Explanation:
For solving this exercise, we are going to use the equation that relates the energy in Joules (E) with the Specific Latent Heat of Fusion (l) and the mass of ice (m):
![E= m * l=15 kg*3,36*10^{5} J/kg=5040000J=5040kJ](https://tex.z-dn.net/?f=%20E%3D%20m%20%2A%20l%3D15%20kg%2A3%2C36%2A10%5E%7B5%7D%20J%2Fkg%3D5040000J%3D5040kJ%20%20)
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Answer:
1. Exothermic.
2. Yes, released.
3. 38.65KJ of heat is released.
Explanation:
The equation for the reaction is given below:
2NO2 —> N2O4...... ΔH = –55.3KJ
1. The sign of the enthalpy change, ΔH tells whether the reaction is endothermic or exothermic. Since the sign of the enthalpy change, ΔH is negative, the reaction is exothermic.
2. The negative sign indicate that heat is released to the surrounding. Since the reaction is generally an exothermic reaction, 64.3g of NO2 will also release heat to the surroundings.
3. Molar mass of NO2 = 14 + (16x2) = 46g/mol
Mass of NO2 from the balanced equation = 2 x 46 = 92g.
From the balanced equation above:
92g of NO2 reacted to release –55.3KJ of heat.
Therefore, 64.3g of NO2 will react to release = (64.3 x –55.3)/92 = 38.65KJ of heat.
Therefore, 38.65KJ of heat is released.
Answer:
I think it is 860 g MG Cl2
Explanation:
your welcome
HCl + NaOH ---> NaCl + H20
If you follow guidance from other questions I have already answered for you, you will see that the above equation is balanced as it is.
A)Potential energy increases but kinetic energy stays the same during a roller coaster ride.
Explanation:
Potential energy is stored energy that depends upon the relative position of various parts of a system.
Kinetic energy is a form of energy that an object or a particle has by reason of its motion
it goes back and fourth