In this section, please list at least three criteria that must be met by your train design. Also include any limitations that could prevent it from getting its cargo to the station. Criteria Limitations

Which statement about hf is true? it is zero for any compound in its standard state. it is positive when the bonds of the product store more energy than those of the reactants. it is negative when a compound forms from elements in their standard states. it is zero for any element that is in the liquid state.