What could cause a PCIe Wi-Fi card to stop a PC from posting?

[RobertQM]

I'm developing a new unit on physical chemistry for my advanced high school students, and I need some good physical chemistry experiments that clearly demonstrate fundamental principles. The challenge is finding experiments that are both conceptually rich and practical to implement in a school lab.

What are your favorite physical chemistry experiments for teaching concepts like thermodynamics, kinetics, or electrochemistry? I'm looking for experimental chemistry techniques that give clear, measurable results and connect theory with practice.

I want students to see how chemistry theory and practice come together in real experiments. Any suggestions for physical chemistry experiments that work well with standard lab equipment?

[Mark.T]

For physical chemistry experiments demonstrating thermodynamics, I love the coffee cup calorimetry experiment. Students measure temperature changes during reactions in insulated cups to calculate enthalpy changes. It's simple, uses inexpensive materials, and gives good results.

For kinetics, the iodine clock reaction is classic for good reason. By varying concentrations, students can determine reaction orders and rate constants. The sudden color change makes timing easy and the experiment visually engaging.

For electrochemistry, building simple galvanic cells with different metal electrodes gives clear voltage measurements. Students can create a reactivity series based on their measurements. These physical chemistry experiments all use standard lab equipment and give quantitative data that connects directly to theory.

[Paisley_T]

For more advanced physical chemistry experiments, consider measuring the heat capacity of metals. Heat different metal samples to the same temperature, then transfer to water and measure temperature change. This teaches about specific heat and heat transfer.

For phase equilibria, you can construct simple phase diagrams for binary mixtures. Mix different proportions of two chemicals with similar melting points, measure melting points, and plot the phase diagram. This demonstrates colligative properties and phase rules.

These experimental chemistry techniques require careful measurement and data analysis, which is great for developing analytical chemistry skills. The results clearly show how chemistry theory and practice intersect, which is exactly what you want students to understand.

[Joshua_M]

I just installed a new PCIe Wi-Fi card, but my desktop won't even post now. The motherboard’s diagnostic LED stops at VGA, and I’m wondering if the card could be causing some kind of resource conflict with my graphics card, even though they’re in separate slots.