已知数列\(\{a_{n}\}\)满足\(a_{1}=1,a_{n}+a_{n+1}=λ\cdot 2^{n}(n\in N*)(λ\)是常数\().\)
\((Ⅰ)\)若\(λ=0\)，证明\(\{a_{n}\}\)是等比数列；
\((Ⅱ)\)若\(λ≠0\)，且\(\{a_{n}\}\)是等比数列，求\(λ\)的值以及数列\(\{(-1)^{n}\log_{2}a_{3n-1}\}\)的前\(n\)项和\(S_{n}.\)