1. ICP 12/11/12 Specific Heat Lab

2. Warmup 1)Calculate the energy required to raise 1 kg of water by 2 degrees Celsius. (Use E=cmΔT) 2)Two objects are in a heavily insulated box. Object A transfers 25 J of heat to Object B. a)How many joules of heat did Object B absorb? b)Which object was hotter at the beginning?

3. Agenda Check homework (front side of specific heat worksheet) Go over homework. Specific Heat Lab Teach how to calculate equilibrium temperature. (Back of Specific Heat Worksheet)

4. Lab Data Sheet (copy this down) FormulaQuantityWaterMystery Object m Mass (g) TiTi Initial Temperature (Celsius) TfTf Final Temperature (Celsius) c Specific Heat (J/gᵒC)4.18 Formula: c mo = c w m w (T f -T iw ) m mo (T f – T imo )

5. Part 2 of Worksheet Calculating Equilibrium Temperature: T f = m 1 c 1 T 1 + m 2 c 2 T 2 m 1 c 1 + m 2 c 2 T f = c 1 T 1 + c 2 T 2 c 1 + c 2 Use this one if the masses are different. Use this one if the masses are the same. ***The numbers 1 and 2 refer to substance 1 and substance 2.