How much heat does it take to melt 5.0g solid copper?
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Ответ:
Explanation:
Hello,
In this case, for latent heat (phase change) we need to consider the enthalpy associated with the involved process, here, melting or fusion; thus, the enthalpy of fusion of copper is 13.2 kJ/mol, therefore, the heat is computed as:
Nevertheless, since the given enthalpy is per mole of copper, we need to use its atomic mass to perform the correct calculation as follows:
Which is positive as it needs to be supplied to the system.
Best regards.
Ответ:
A single-replacement reaction replaces one element for another in a compound. ... A double-replacement reaction exchanges the cations (or the anions) of two ionic compounds.
Explanation: