Nome: Disciplina: Química Nº : Professora: Andrea Turma: 9º ano _____ Data: _____/_____/_____ Trimestre: 1º ROTEIRO DE ESTUDOS PE 1 – 9º ANO 1) O que é uma reação química? Como podemos diferenciá-la do fenômeno físico? Dê 2 exemplos de cada. 2) Quais são as evidências que caracterizam uma reação química? 3) Quais são as maneiras de acelerar uma reação química? Explique-as. 4) O que propõe as Leis de Lavoisier e de Proust? Explique-as. 5) Defina reagentes e produtos. 6) O que são reações endotérmicas e exotérmicas? Dê 2 exemplos de cada. 7) Faça o balanceamento das equações químicas abaixo: ____ Mg(OH)2 + _____ HCl _____ Na2Cr2O7 + _____ SO2 + ____ H2O ____ MgCl2 + ______ H2O _____ Cr(OH)SO4 + _____ Na2SO4 8) Quais são as maneiras de retardar a reação química, para por exemplo, conservar os alimentos? Explique cada uma delas. ATENÇÃO: Use as linhas abaixo e se necessário, adicione uma folha do papel timbrado. ________________________________________________________________________________________ ________________________________________________________________________________________ ________________________________________________________________________________________ ________________________________________________________________________________________ ________________________________________________________________________________________ ________________________________________________________________________________________ ________________________________________________________________________________________ ________________________________________________________________________________________ ________________________________________________________________________________________ ________________________________________________________________________________________ ________________________________________________________________________________________ ________________________________________________________________________________________ ________________________________________________________________________________________ ________________________________________________________________________________________ ________________________________________________________________________________________ ________________________________________________________________________________________ ________________________________________________________________________________________ ________________________________________________________________________________________ ________________________________________________________________________________________ ________________________________________________________________________________________ ________________________________________________________________________________________ ________________________________________________________________________________________ ________________________________________________________________________________________ ________________________________________________________________________________________ ________________________________________________________________________________________ ________________________________________________________________________________________ ________________________________________________________________________________________ ________________________________________________________________________________________ ________________________________________________________________________________________ ________________________________________________________________________________________ ________________________________________________________________________________________ ________________________________________________________________________________________ ________________________________________________________________________________________ ________________________________________________________________________________________ ________________________________________________________________________________________ ________________________________________________________________________________________ ________________________________________________________________________________________ ________________________________________________________________________________________ ________________________________________________________________________________________ ________________________________________________________________________________________ ________________________________________________________________________________________ ________________________________________________________________________________________ ________________________________________________________________________________________ ________________________________________________________________________________________ ________________________________________________________________________________________