Question

Can someone please help me how to write down the equation and get the answer?

Answer 1

$\huge { \blue{\underbrace{\pink{\overbrace{\green{Answer}}}}}}$

→ - 31,380° C

$\bf \tt \: Use \: \: the \: \: formula$

Q = MC∆T

where :

Q is heat energy, m is mass, c is specific heat, and ∆T is change in Temperature.

$∆T\: = T_{final} - T_{initial}$

$\\ \bf \: GIVEN : \\ \\ \: \tt m \: = 250g \\ \\ \: \tt \: c = \frac{4.184j }{g.c} \\ \tt \: T_{initial} =95°C \\ \tt T_{final} = 65°C$

∆T = 65°C - 95°C = – 30°C

$\bf \: To \: \: find : \\ \tt \: • Q \:$

$\bf \mathfrak { \blue{\underline{\green{solution}}}}:$

$\tt \: Put \: \: the \: \: given \: \: values \: \: in \: \: the \: \: formula$

• Q = MC∆T

$\tt \: Q\: = (250g) (\frac{4.184 \: j}{g•°C} )( - 30°C) \\ \\ \: \tt \: = > - 31,380\: j\\ \\ \tt \: the \: \: negative \: \: signs \: \: means \: \: that \: \: energy \\ \tt was \: \: released$

Answer 2

Answer:

EQUATION:

Measuring the Quantity of Heat

What Does Heat Do?

Measuring the Quantity of Heat

Calorimeters and Calorimetry

On the previous page, we learned what heat does to an object when it is gained or released. Heat gains or losses result in changes in temperature, changes in state or the performance of work. Heat is a transfer of energy.

SHOW YOUR WORK:

Specific Heat Capacity

Suppose that several objects composed of different materials are heated in the same manner. Will the objects warm up at equal rates? The answer: most likely not. Different materials would warm up at different rates because each material has its own specific heat capacity. The specific heat capacity refers to the amount of heat required to cause a unit of mass (say a gram or a kilogram) to change its temperature by 1°C. Specific heat capacities of various materials are often listed in textbooks.

Explanation:

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