Boiling and freezing points of pure substances are well-known and easily looked up. For instance, almost everyone knows that the freezing point of water is 0 degrees Celsius, and the boiling point of water is 100 degrees Celsius. Freezing and boiling points change when matter is dissolved into a liquid; freezing ...

13b peripheral port hpAll you did is essentially right, your only mistake is in the last step, as LDC3 already pointed out in the comments. However, I am encouraging you to use units all the way and when dealing with thermodynamics use Kelvin instead of Celsius. \begin{align} Q &= mc\Delta T\\ \end{align} Now you can form the equations for each of the problem, while substituting $\Delta T$ with a temperature range ...

Specific. Heat capacity: the amount of heat required to increase the temperature of 1 kg of a substance by 10C. SPECIFIC HEAT CAPACITY Amount. of heat , q (joule) MASS, m (KILOGRAM) CHANGE IN TEMPERATURE, (0C ) SPECIFIC HEAT CAPACITY, c. c = Q___ m . Unit : J kg-1 0C-1 Applications of heat capacity The sparks of a sparkler do not burn the hand ...