Chemistry Past Paper PDF
Document Details
Uploaded by RejoicingActinium
Delta University Egypt
Tags
Summary
The document appears to be handwritten notes or solutions to chemistry problems involving gas laws. It includes various formulas, calculations, like PV = nRT and examples of solving for variables like V2,T. and n. The content likely serves as practice for chemistry exams. No exam board is specified, nor any date/year.
Full Transcript
### تاريخ: الموضوع : 1. * P₁ = 19+m * V₁ = 2L * P₂=0,809+m * V₂=? * P₁V₁=P₂V₂ * 1X1=0g80 V₂ * V₂= 295L 2. * R=0,0821 * N = 3 + Litter * P=0,94 at m * T=50+273=323 K * $n = \frac{PV}{RT}$ * $n = \frac{0,94 \times 3}{...
### تاريخ: الموضوع : 1. * P₁ = 19+m * V₁ = 2L * P₂=0,809+m * V₂=? * P₁V₁=P₂V₂ * 1X1=0g80 V₂ * V₂= 295L 2. * R=0,0821 * N = 3 + Litter * P=0,94 at m * T=50+273=323 K * $n = \frac{PV}{RT}$ * $n = \frac{0,94 \times 3}{0,0821 \times 323} = 0,9120$ * molecular weight = $\frac{mass}{number of moles} = \frac{75}{0,9120} = 47,919$ 3. * mass of CO₂)=29 * V = 2L * P=1, 21 atm * T=2 * $PV=nRT$ * $n = \frac{PV}{RT}$ * $n = \frac{1,21 \times 2}{0,0821 \times 2} = 0,0625$ * $T = \frac{PV}{nR}$ * $T = \frac{1,21 \times 2}{0,0625 \times 0,0821} = 47196 K$ * $T = 47196 - 273 =198,60^\circ C$ 4. * V₁ = 197L * V₂ = 197L * h₁ = 3 * h₂= 3+5=8 * $\frac{V_1}{h_1} = \frac{V_2}{h_2}$ * $\frac{197}{3} = \frac{V_2}{8}$ * $V_2 = \frac{197 \times 8}{3} = 4353L$
