Explain what will happen when cold water is placed in a sealed room after an amount of time and what type of system is it ?

- Water's temperature will be in equilibrium with the surrounding temperature.

- Closed system.

Explanation:

Hello,

In this case, in thermodynamics we define a sealed room as a closed system (matter neither leaves nor enters to the system) which allows the energy transfer as it is not isolated. In such a way, as time goes by, the water will exchange energy with the surroundings in order to attain the thermal equilibrium (equal temperature for both water and surroundings). Thus, if the surroundings are hotter than the cold water, it will heat up until equilibrium temperature. Moreover, if the surroundings are colder than the water, it will cool down until equilibrium temperature.

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explanation:

let the different atoms be x and y. each with four protons and same mass will be represented as follows.

mass number is number of protons + number of neutrons.

            and  

since, it is given that one has a negative charge while the other is neutral. therefore, there will be increase in number of protons and the atom will be represented as follows.

according to periodic table, mass number of beryllium is 9 and it has atomic number 4 so, the atoms will be and .  

the protons and neutrons will be located inside the nucleus whereas the electrons will be revolving around the nucleus.