Answer:
D. Force of attraction between one atom and another atom
Explanation:
Chemical bond is the force of attraction between the atoms, molecules or ions due to which different types of chemical compounds are formed. Based on the types of attractions the bonds have been categorized in the following three categories-
- Ionic bonds - there is electrostatic force of attraction between the charged ions
- Covalent bonds - mutual sharing of the electrons occur
- Metallic bond - here many detached electrons are shared between more than two positively charged ions.
For a polar molecule<span>, your bonds will not cancel out. This means that in a </span>polar<span> bond, the electronegativity of the atoms will be different. For </span>nonpolar<span> bonds the electronegativity of the atoms will be equal. In a </span>polar<span> bond you will have an unequal sharing of electron pairs which causes a molecular dipole.</span>
The answer has to depend on the mass of the copper that you're trying to melt.
But there is a formula which you can calculate the energy required if you have the information of the mass. This formula requires the value called specific latent heat of fusion, which is the energy required to melt or freeze a specific mass of copper without changing its temperature but change its state.
E is the total energy required, m is the mass, and lv is the specific latent heat of fusion of copper.
Usually, in questions, lv is given. But we can also look it up online which is around 205kJ kg^-1
this means, to melt or freeze a copper, we need to work the mass multiplied by 205kJ in order to calculate its total energy needed or released.