Temperature

• How Does a Cell’s Internal Resistance Vary With Temperature?
  A cell’s internal resistance usually falls as temperature rises because its electrolyte conducts better, but the trend depends on chemistry and conditions.
• How Do Molarity and Molality Depend on Temperature?
  Molarity usually falls as a solution warms because its volume expands; molality stays constant if the masses of solute and solvent remain unchanged.
• Why Does Water Feel Cooler Than Air at the Same Temperature?
  Water usually feels colder than air at the same temperature because it removes heat from skin faster; conductivity, heat capacity, and evaporation explain why.