Question 10 unsaved if heat energy is transferred from direct contact between a warm object and a cold object, it has been transferred by question 10 options: 1) radiation 2) convection 3) the sun 4) conduction

I don't know the answer but imma go with number 1.radiation

Answerδh > 0explanationc₆h₆  (s)  → c₆h₆ (l)if you are changing it from a solid to a liquid, you are pretty much melting the solid. this requires heat energy. therefore, the reaction is endothermic (takes in energy); the system enthalpy increases as the reaction proceeds: δh > 0.