For a particular reaction, Δ=−111.4 kJ and Δ=−25.0 J/K. Calculate Δ for this reaction at 298 K.
Δ= ?

Large helium-filled balloons are used to lift scientific equipment to high altitudes. what is the pressure inside such a balloon if it starts out at sea level with a temperature of 10.0ºc and rises to an altitude where its volume is twenty times the original volume and its temperature is – 50.0ºc ?

Which best describes the activation energy of a chemical reaction? a. the combined energy of all the reactants b. the amount of energy required for a reaction to occur c. the difference in energy between products and reactants d. the potential energy stored in the bonds of reactants and products

The graph shows one consequence of urban sprawl. how did urban sprawl contribute to the change in biodiversity