Calcule a quantidade de calor liberado na queima de de acetileno a e .
calores de formação padrão a $25\ ^{\circ}\text{C}$$$(\Delta\text{H}^{\circ}_f)\ \ce{C2H2}=+54{
}2\text{ kcal/mol}$$$$(\Delta\text{H}^{\circ}_f)\ \ce{CO2}=-94{,}1\text{ kcal/mol}$$$$(\Delta\text{H}^{\circ}_f)\ \ce{H2O}=-57{
}8\text{ kcal/mol}$$
}2\text{ kcal/mol}$$$$(\Delta\text{H}^{\circ}_f)\ \ce{CO2}=-94{,}1\text{ kcal/mol}$$$$(\Delta\text{H}^{\circ}_f)\ \ce{H2O}=-57{
}8\text{ kcal/mol}$$