After conditions changed to a volume of a sample of helium at 15.29 mL, 154.4°C and 279.5 kPa. What was its initial volume at 40.1 °C and 41.7 kPa?

What type of matter is made of only one kind of atom

Two metal blocks that have slightly different temperatures are placed next to one another. after five minutes, they both have lower but equal temperatures. according to the law of conservation of energy, what  most likelyhappened? energy was created inside the blocks.energy was destroyed inside the blocks.energy was absorbed into the blocks from outside the system.energy was transferred from the warmer block to the cooler block.

To find the enthalpy of a reaction in the lab, you measured the of the reactants and the change during the reaction.