How many joules of heat will be needed to change 1g of ice from -15°c to 0°c

Compare and contrast physical changes with chemical changes.

If i can still dissolve more sugar into the solution at a certain temperature what would i call that solution

Hydrogenation reactions, in which h2 and an "unsaturated" organic compound combine, are used in the food, fuel, and polymer industries. in the simplest case, ethene (c2h4) and h2 form ethane (c2h6). if 140 kj is given off per mole of c2h4 reacting, how much heat (in mj) is released when 12 kg of c2h6 forms?