Two identical beakers are placed on a hotplate at the sametime. Beaker A contain

Question

Two identical beakers are placed on a hotplate at the sametime. Beaker A contains 500g of water and beaker B contains250g of water both at an initial temperature of 20oC. If the final temperature of the water in A is32o C, what would be the final temperature of the waterin beaker B? Explain and provide an equation ifpossible. Also, if the heating curve on a chart was constant for beakerA, would the heating curve for beaker B be curved or just besteeper positive slope? Two identical beakers are placed on a hotplate at the sametime. Beaker A contains 500g of water and beaker B contains250g of water both at an initial temperature of 20oC. If the final temperature of the water in A is32o C, what would be the final temperature of the waterin beaker B? Explain and provide an equation ifpossible. Also, if the heating curve on a chart was constant for beakerA, would the heating curve for beaker B be curved or just besteeper positive slope?

Explanation / Answer

For A : ------- mass m = 500 g Specific heat C = 1 cal / g oC temperature difference dt = 32 - 20 = 12 oC So, heat taken Q = m C dt                            =6000 cal For B : -------- mass M = 250 g So, temperature raise   dt = Q / MC                                        = 24 oC So, final emp of B = 20 + 24 = 44 oC

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