Which is true about the catalyst?
Which statement correctly defines enthalpy change (ΔH)?
Why is a polystyrene cup used in calorimetry experiments?
Hydrogen gas reacts with chlorine gas to form hydrogen chloride according to the following equation: H₂ + Cl₂ → 2HCl. The bond energies of the relevant bonds are:- H–H = 436 kJ/mol- Cl–Cl = 243 kJ/mol- H–Cl = 431 kJ/mol.What is the overall enthalpy change?
A student heats 50.0 g of water from 20 °C to 30 °C. Given c = 4.18 J/g°C for water. What is the energy absorbed? What is the energy absorbed?
Which is most reactive based on energy released?