How much heat (in kJ) is produced when 100 mL of 0.250 M HCl (density, 1.00 g/mL) and 200 mL of 0.150 M NaOH (density, 1.00 g/mL) are mixed? LaTeX: \Delta H^0_{rxn}=-58\:kJ

Explanation:

Hello,

In this case, given the neutralization reaction between sodium hydroxide and hydrochloric acid:

We can compute the heat that is produced due to the reaction by noticing that the hydrochloric acid is the limiting reactant, so the change in the enthalpy of reaction is referred to it. In such a way, we compute the reacting moles of acid:

Finally, we compute the heat by using the given enthalpy of reaction:

Best regards.

it is to be noted that an alpha particle is an helium nucleus. so it contains 2 protons 2 neutrons and has a mass number of 4. when alpha decay particles are ejected from the nucleus it gets transformed into an atom which has atomic number less than 2 and a mass number less than 4.

an equation that could represent alpha decay is radium 226 decay of alpha particle forms radon 222.

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